20331221021012 has 24 divisors (see below), whose sum is σ = 38814682848480. Its totient is φ = 9241337046560.

The previous prime is 20331221020991. The next prime is 20331221021071. The reversal of 20331221021012 is 21012012213302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98363 + ... + 6377469.

It is an arithmetic number, because the mean of its divisors is an integer number (1617278452020).

Almost surely, 2^{20331221021012} is an apocalyptic number.

20331221021012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20331221021012 is a deficient number, since it is larger than the sum of its proper divisors (18483461827468).

20331221021012 is a wasteful number, since it uses less digits than its factorization.

20331221021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6352711 (or 6352709 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20331221021012 its reverse (21012012213302), we get a palindrome (41343233234314).

The spelling of 20331221021012 in words is "twenty trillion, three hundred thirty-one billion, two hundred twenty-one million, twenty-one thousand, twelve".