102111110212021 has 4 divisors (see below), whose sum is σ = 102132246857344. Its totient is φ = 102089973566700.

The previous prime is 102111110212009. The next prime is 102111110212039. The reversal of 102111110212021 is 120212011111201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102111110212021 - 2⁵ = 102111110211989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102111110211986 and 102111110212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111110212121) 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, 10568315415 + ... + 10568325076.

It is an arithmetic number, because the mean of its divisors is an integer number (25533061714336).

Almost surely, 2^{102111110212021} is an apocalyptic number.

It is an amenable number.

102111110212021 is a deficient number, since it is larger than the sum of its proper divisors (21136645323).

102111110212021 is an equidigital number, since it uses as much as digits as its factorization.

102111110212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21136645322.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 102111110212021 its reverse (120212011111201), we get a palindrome (222323121323222).

The spelling of 102111110212021 in words is "one hundred two trillion, one hundred eleven billion, one hundred ten million, two hundred twelve thousand, twenty-one".