2031321212220 has 48 divisors (see below), whose sum is σ = 5808714283008. Its totient is φ = 530160429120.

The previous prime is 2031321212113. The next prime is 2031321212257. The reversal of 2031321212220 is 222121231302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360160516 + ... + 360166155.

It is an arithmetic number, because the mean of its divisors is an integer number (121014880896).

Almost surely, 2^{2031321212220} is an apocalyptic number.

2031321212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2031321212220 is an abundant number, since it is smaller than the sum of its proper divisors (3777393070788).

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

2031321212220 is a wasteful number, since it uses less digits than its factorization.

2031321212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720326730 (or 720326728 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 2031321212220 its reverse (222121231302), we get a palindrome (2253442443522).

The spelling of 2031321212220 in words is "two trillion, thirty-one billion, three hundred twenty-one million, two hundred twelve thousand, two hundred twenty".