102101001212921 has 2 divisors, whose sum is σ = 102101001212922. Its totient is φ = 102101001212920.

The previous prime is 102101001212887. The next prime is 102101001212981. The reversal of 102101001212921 is 129212100101201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86396932050025 + 15704069162896 = 9294995^2 + 3962836^2 .

It is a cyclic number.

It is not a de Polignac number, because 102101001212921 - 2⁶ = 102101001212857 is a prime.

It is a super-2 number, since 2×102101001212921² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (102101001212981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51050500606460 + 51050500606461.

It is an arithmetic number, because the mean of its divisors is an integer number (51050500606461).

Almost surely, 2^{102101001212921} is an apocalyptic number.

It is an amenable number.

102101001212921 is a deficient number, since it is larger than the sum of its proper divisors (1).

102101001212921 is an equidigital number, since it uses as much as digits as its factorization.

102101001212921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 102101001212921 in words is "one hundred two trillion, one hundred one billion, one million, two hundred twelve thousand, nine hundred twenty-one".