102111111102021 has 16 divisors (see below), whose sum is σ = 156412532195328. Its totient is φ = 58043713114800.

The previous prime is 102111111102017. The next prime is 102111111102023. The reversal of 102111111102021 is 120201111111201.

It is not a de Polignac number, because 102111111102021 - 2² = 102111111102017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111111102023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12728880445 + ... + 12728888466.

It is an arithmetic number, because the mean of its divisors is an integer number (9775783262208).

Almost surely, 2^{102111111102021} is an apocalyptic number.

It is an amenable number.

102111111102021 is a deficient number, since it is larger than the sum of its proper divisors (54301421093307).

102111111102021 is a wasteful number, since it uses less digits than its factorization.

102111111102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25457769112.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 102111111102021 its reverse (120201111111201), we get a palindrome (222312222213222).

The spelling of 102111111102021 in words is "one hundred two trillion, one hundred eleven billion, one hundred eleven million, one hundred two thousand, twenty-one".