102121010210021 has 8 divisors (see below), whose sum is σ = 111658507752000. Its totient is φ = 92625807558240.

The previous prime is 102121010209961. The next prime is 102121010210047. The reversal of 102121010210021 is 120012010121201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102121010210021 - 2²⁶ = 102120943101157 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102121010209978 and 102121010210005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121010210521) 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 7 ways as a sum of consecutive naturals, for example, 10573717496 + ... + 10573727153.

It is an arithmetic number, because the mean of its divisors is an integer number (13957313469000).

Almost surely, 2^{102121010210021} is an apocalyptic number.

102121010210021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102121010210021 is a deficient number, since it is larger than the sum of its proper divisors (9537497541979).

102121010210021 is a wasteful number, since it uses less digits than its factorization.

102121010210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21147445099.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 102121010210021 its reverse (120012010121201), we get a palindrome (222133020331222).

The spelling of 102121010210021 in words is "one hundred two trillion, one hundred twenty-one billion, ten million, two hundred ten thousand, twenty-one".