221010120012 has 48 divisors (see below), whose sum is σ = 576292477824. Its totient is φ = 65339280000.

The previous prime is 221010120007. The next prime is 221010120061. The reversal of 221010120012 is 210021010122.

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 221010120012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20413114 + ... + 20423937.

It is an arithmetic number, because the mean of its divisors is an integer number (12006093288).

Almost surely, 2^221010120012 is an apocalyptic number.

221010120012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221010120012 is an abundant number, since it is smaller than the sum of its proper divisors (355282357812).

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

221010120012 is a wasteful number, since it uses less digits than its factorization.

221010120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40837110 (or 40837108 counting only the distinct ones).

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

Adding to 221010120012 its reverse (210021010122), we get a palindrome (431031130134).

The spelling of 221010120012 in words is "two hundred twenty-one billion, ten million, one hundred twenty thousand, twelve".