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101120021 is a prime number
BaseRepresentation
bin1100000011011…
…11100000010101
321001021102120222
412001233200111
5201341320041
614011204125
72335335362
oct601574025
9231242528
10101120021
1152096a72
1229a46645
1317c46542
14d603469
158d2674b
hex606f815

101120021 has 2 divisors, whose sum is σ = 101120022. Its totient is φ = 101120020.

The previous prime is 101120009. The next prime is 101120039. The reversal of 101120021 is 120021101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85359121 + 15760900 = 9239^2 + 3970^2 .

It is an emirp because it is prime and its reverse (120021101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101120021 - 218 = 100857877 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 101119990 and 101120008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101120051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50560010 + 50560011.

It is an arithmetic number, because the mean of its divisors is an integer number (50560011).

Almost surely, 2101120021 is an apocalyptic number.

It is an amenable number.

101120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

101120021 is an equidigital number, since it uses as much as digits as its factorization.

101120021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 101120021 is about 10055.8451161501. The cubic root of 101120021 is about 465.8853460555.

Adding to 101120021 its reverse (120021101), we get a palindrome (221141122).

It can be divided in two parts, 101 and 120021, that multiplied together give a palindrome (12122121).

The spelling of 101120021 in words is "one hundred one million, one hundred twenty thousand, twenty-one".