31300021003020 has 384 divisors, whose sum is σ = 115780481187840. Its totient is φ = 6116684820480.

The previous prime is 31300021002953. The next prime is 31300021003021. The reversal of 31300021003020 is 2030012000313.

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

It is not an unprimeable number, because it can be changed into a prime (31300021003021) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 104072421 + ... + 104372739.

It is an arithmetic number, because the mean of its divisors is an integer number (301511669760).

Almost surely, 2^{31300021003020} is an apocalyptic number.

31300021003020 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 31300021003020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57890240593920).

31300021003020 is an abundant number, since it is smaller than the sum of its proper divisors (84480460184820).

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

31300021003020 is a wasteful number, since it uses less digits than its factorization.

31300021003020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301693 (or 301691 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 31300021003020 its reverse (2030012000313), we get a palindrome (33330033003333).

The spelling of 31300021003020 in words is "thirty-one trillion, three hundred billion, twenty-one million, three thousand, twenty".