102021210012 has 24 divisors (see below), whose sum is σ = 238192166800. Its totient is φ = 33986687616.

The previous prime is 102021210007. The next prime is 102021210013. The reversal of 102021210012 is 210012120201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 102021210012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021210013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2526937 + ... + 2566992.

Almost surely, 2^102021210012 is an apocalyptic number.

102021210012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102021210012 is an abundant number, since it is smaller than the sum of its proper divisors (136170956788).

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

102021210012 is a wasteful number, since it uses less digits than its factorization.

102021210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5095605 (or 5095603 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102021210012 its reverse (210012120201), we get a palindrome (312033330213).

The spelling of 102021210012 in words is "one hundred two billion, twenty-one million, two hundred ten thousand, twelve".