102012010111021 has 4 divisors (see below), whose sum is σ = 102190665120544. Its totient is φ = 101833355101500.

The previous prime is 102012010110991. The next prime is 102012010111087. The reversal of 102012010111021 is 120111010210201.

It is a happy number.

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 102012010111021 - 2⁷ = 102012010110893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102012010110992 and 102012010111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012010111621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89327503905 + ... + 89327505046.

It is an arithmetic number, because the mean of its divisors is an integer number (25547666280136).

Almost surely, 2^{102012010111021} is an apocalyptic number.

It is an amenable number.

102012010111021 is a deficient number, since it is larger than the sum of its proper divisors (178655009523).

102012010111021 is an equidigital number, since it uses as much as digits as its factorization.

102012010111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178655009522.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 102012010111021 its reverse (120111010210201), we get a palindrome (222123020321222).

The spelling of 102012010111021 in words is "one hundred two trillion, twelve billion, ten million, one hundred eleven thousand, twenty-one".