31200310012020 has 192 divisors, whose sum is σ = 92120404992000. Its totient is φ = 7868343297024.

The previous prime is 31200310012019. The next prime is 31200310012121. The reversal of 31200310012020 is 2021001300213.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1959933621 + ... + 1959949539.

It is an arithmetic number, because the mean of its divisors is an integer number (479793776000).

Almost surely, 2^{31200310012020} is an apocalyptic number.

31200310012020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31200310012020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46060202496000).

31200310012020 is an abundant number, since it is smaller than the sum of its proper divisors (60920094979980).

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

31200310012020 is a wasteful number, since it uses less digits than its factorization.

31200310012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18862 (or 18860 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31200310012020 its reverse (2021001300213), we get a palindrome (33221311312233).

The spelling of 31200310012020 in words is "thirty-one trillion, two hundred billion, three hundred ten million, twelve thousand, twenty".