102121005921 has 8 divisors (see below), whose sum is σ = 148539645024. Its totient is φ = 61891518720.

The previous prime is 102121005887. The next prime is 102121005929. The reversal of 102121005921 is 129500121201.

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

It is not a de Polignac number, because 102121005921 - 2²⁷ = 101986788193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102121005891 and 102121005900.

It is not an unprimeable number, because it can be changed into a prime (102121005929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1547287936 + ... + 1547288001.

It is an arithmetic number, because the mean of its divisors is an integer number (18567455628).

Almost surely, 2^102121005921 is an apocalyptic number.

102121005921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102121005921 is a deficient number, since it is larger than the sum of its proper divisors (46418639103).

102121005921 is a wasteful number, since it uses less digits than its factorization.

102121005921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3094575951.

The product of its (nonzero) digits is 360, while the sum is 24.

The spelling of 102121005921 in words is "one hundred two billion, one hundred twenty-one million, five thousand, nine hundred twenty-one".