102021002212122 has 64 divisors (see below), whose sum is σ = 259102989250560. Its totient is φ = 29148629259312.

The previous prime is 102021002212111. The next prime is 102021002212127. The reversal of 102021002212122 is 221212200120201.

It is a happy number.

102021002212122 is a `hidden beast` number, since 1 + 0 + 20 + 210 + 0 + 221 + 212 + 2 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 102021002212095 and 102021002212104.

It is not an unprimeable number, because it can be changed into a prime (102021002212127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50547883 + ... + 52527425.

It is an arithmetic number, because the mean of its divisors is an integer number (4048484207040).

Almost surely, 2^{102021002212122} is an apocalyptic number.

102021002212122 is an abundant number, since it is smaller than the sum of its proper divisors (157081987038438).

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

102021002212122 is a wasteful number, since it uses less digits than its factorization.

102021002212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115904 (or 2115898 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 102021002212122 its reverse (221212200120201), we get a palindrome (323233202332323).

The spelling of 102021002212122 in words is "one hundred two trillion, twenty-one billion, two million, two hundred twelve thousand, one hundred twenty-two".