1201100101 has 2 divisors, whose sum is σ = 1201100102. Its totient is φ = 1201100100.

The previous prime is 1201100081. The next prime is 1201100107. The reversal of 1201100101 is 1010011021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1160764900 + 40335201 = 34070^2 + 6351^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201100101 - 2¹⁵ = 1201067333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201100107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600550050 + 600550051.

It is an arithmetic number, because the mean of its divisors is an integer number (600550051).

Almost surely, 2^1201100101 is an apocalyptic number.

It is an amenable number.

1201100101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201100101 is an equidigital number, since it uses as much as digits as its factorization.

1201100101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 1201100101 is about 34656.8911040791. The cubic root of 1201100101 is about 1062.9832010436.

Adding to 1201100101 its reverse (1010011021), we get a palindrome (2211111122).

The spelling of 1201100101 in words is "one billion, two hundred one million, one hundred thousand, one hundred one".