102000012021 has 8 divisors (see below), whose sum is σ = 151111128960. Its totient is φ = 68000007996.

The previous prime is 102000011999. The next prime is 102000012041. The reversal of 102000012021 is 120210000201.

It is not a de Polignac number, because 102000012021 - 2⁵ = 102000011989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 102000011994 and 102000012012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102000012041) 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, 1888889085 + ... + 1888889138.

It is an arithmetic number, because the mean of its divisors is an integer number (18888891120).

Almost surely, 2^102000012021 is an apocalyptic number.

It is an amenable number.

102000012021 is a deficient number, since it is larger than the sum of its proper divisors (49111116939).

102000012021 is an equidigital number, since it uses as much as digits as its factorization.

102000012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777778232 (or 3777778226 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 102000012021 its reverse (120210000201), we get a palindrome (222210012222).

The spelling of 102000012021 in words is "one hundred two billion, twelve thousand, twenty-one".