102121021220210 has 16 divisors (see below), whose sum is σ = 183818006873496. Its totient is φ = 40848371004288.

The previous prime is 102121021220201. The next prime is 102121021220227. The reversal of 102121021220210 is 12022120121201.

It can be written as a sum of positive squares in 4 ways, for example, as 102027029310649 + 93991909561 = 10100843^2 + 306581^2 .

It is a super-2 number, since 2×102121021220210² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8532734 + ... + 16644806.

Almost surely, 2^{102121021220210} is an apocalyptic number.

102121021220210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102121021220210 is a deficient number, since it is larger than the sum of its proper divisors (81696985653286).

102121021220210 is a wasteful number, since it uses less digits than its factorization.

102121021220210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9370957.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 102121021220210 its reverse (12022120121201), we get a palindrome (114143141341411).

The spelling of 102121021220210 in words is "one hundred two trillion, one hundred twenty-one billion, twenty-one million, two hundred twenty thousand, two hundred ten".