102021111012021 has 16 divisors (see below), whose sum is σ = 139860099310848. Its totient is φ = 66110341017600.

The previous prime is 102021111011959. The next prime is 102021111012031. The reversal of 102021111012021 is 120210111120201.

It is a happy number.

It is not a de Polignac number, because 102021111012021 - 2¹¹ = 102021111009973 is a prime.

It is a super-2 number, since 2×102021111012021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021111012031) 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, 1530298636 + ... + 1530365301.

It is an arithmetic number, because the mean of its divisors is an integer number (8741256206928).

Almost surely, 2^{102021111012021} is an apocalyptic number.

It is an amenable number.

102021111012021 is a deficient number, since it is larger than the sum of its proper divisors (37838988298827).

102021111012021 is a wasteful number, since it uses less digits than its factorization.

102021111012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060664252.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 102021111012021 its reverse (120210111120201), we get a palindrome (222231222132222).

The spelling of 102021111012021 in words is "one hundred two trillion, twenty-one billion, one hundred eleven million, twelve thousand, twenty-one".