102021220210120 has 16 divisors (see below), whose sum is σ = 229547745472860. Its totient is φ = 40808488084032.

The previous prime is 102021220210087. The next prime is 102021220210123. The reversal of 102021220210120 is 21012022120201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 100870968250116 + 1150251960004 = 10043454^2 + 1072498^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102021220210094 and 102021220210103.

It is not an unprimeable number, because it can be changed into a prime (102021220210123) 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 3 ways as a sum of consecutive naturals, for example, 1275265252587 + ... + 1275265252666.

Almost surely, 2^{102021220210120} is an apocalyptic number.

102021220210120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021220210120 is an abundant number, since it is smaller than the sum of its proper divisors (127526525262740).

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

102021220210120 is a wasteful number, since it uses less digits than its factorization.

102021220210120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550530505264 (or 2550530505260 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 102021220210120 its reverse (21012022120201), we get a palindrome (123033242330321).

The spelling of 102021220210120 in words is "one hundred two trillion, twenty-one billion, two hundred twenty million, two hundred ten thousand, one hundred twenty".