102111120021 has 16 divisors (see below), whose sum is σ = 136426717184. Its totient is φ = 67934893104.

The previous prime is 102111120011. The next prime is 102111120029. The reversal of 102111120021 is 120021111201.

It is not a de Polignac number, because 102111120021 - 2¹⁴ = 102111103637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102111119979 and 102111120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111120029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5247516 + ... + 5266938.

It is an arithmetic number, because the mean of its divisors is an integer number (8526669824).

Almost surely, 2^102111120021 is an apocalyptic number.

It is an amenable number.

102111120021 is a deficient number, since it is larger than the sum of its proper divisors (34315597163).

102111120021 is a wasteful number, since it uses less digits than its factorization.

102111120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22920.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 102111120021 its reverse (120021111201), we get a palindrome (222132231222).

The spelling of 102111120021 in words is "one hundred two billion, one hundred eleven million, one hundred twenty thousand, twenty-one".