102101101001021 has 4 divisors (see below), whose sum is σ = 102546957337500. Its totient is φ = 101655244664544.

The previous prime is 102101101000981. The next prime is 102101101001051. The reversal of 102101101001021 is 120100101101201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99500425500100 + 2600675500921 = 9974990^2 + 1612661^2 .

It is a cyclic number.

It is not a de Polignac number, because 102101101001021 - 2³⁴ = 102083921131837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102101101000993 and 102101101001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102101101001051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222928167896 + ... + 222928168353.

It is an arithmetic number, because the mean of its divisors is an integer number (25636739334375).

Almost surely, 2^{102101101001021} is an apocalyptic number.

It is an amenable number.

102101101001021 is a deficient number, since it is larger than the sum of its proper divisors (445856336479).

102101101001021 is an equidigital number, since it uses as much as digits as its factorization.

102101101001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445856336478.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 102101101001021 its reverse (120100101101201), we get a palindrome (222201202102222).

The spelling of 102101101001021 in words is "one hundred two trillion, one hundred one billion, one hundred one million, one thousand, twenty-one".