102021020002120 has 16 divisors (see below), whose sum is σ = 229547295004860. Its totient is φ = 40808408000832.

The previous prime is 102021020002117. The next prime is 102021020002141. The reversal of 102021020002120 is 21200020120201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 101835829207876 + 185190794244 = 10091374^2 + 430338^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 102021020002120.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1275262749987 + ... + 1275262750066.

Almost surely, 2^{102021020002120} is an apocalyptic number.

102021020002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021020002120 is an abundant number, since it is smaller than the sum of its proper divisors (127526275002740).

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

102021020002120 is a wasteful number, since it uses less digits than its factorization.

102021020002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550525500064 (or 2550525500060 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 102021020002120 its reverse (21200020120201), we get a palindrome (123221040122321).

The spelling of 102021020002120 in words is "one hundred two trillion, twenty-one billion, twenty million, two thousand, one hundred twenty".