102021221112012 has 18 divisors (see below), whose sum is σ = 257886975588788. Its totient is φ = 34007073703992.

The previous prime is 102021221111879. The next prime is 102021221112037. The reversal of 102021221112012 is 210211122120201.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1416961404298 + ... + 1416961404369.

Almost surely, 2^{102021221112012} is an apocalyptic number.

102021221112012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102021221112012 is an abundant number, since it is smaller than the sum of its proper divisors (155865754476776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102021221112012 is a wasteful number, since it uses less digits than its factorization.

102021221112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2833922808677 (or 2833922808672 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 102021221112012 its reverse (210211122120201), we get a palindrome (312232343232213).

The spelling of 102021221112012 in words is "one hundred two trillion, twenty-one billion, two hundred twenty-one million, one hundred twelve thousand, twelve".