30531021021320 has 32 divisors (see below), whose sum is σ = 68696655292800. Its totient is φ = 12212078098368.

The previous prime is 30531021021287. The next prime is 30531021021353. The reversal of 30531021021320 is 2312012013503.

It is an interprime number because it is at equal distance from previous prime (30531021021287) and next prime (30531021021353).

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 7 ways as a sum of consecutive naturals, for example, 8822114 + ... + 11785233.

It is an arithmetic number, because the mean of its divisors is an integer number (2146770477900).

Almost surely, 2^{30531021021320} is an apocalyptic number.

It is an amenable number.

30531021021320 is an abundant number, since it is smaller than the sum of its proper divisors (38165634271480).

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

30531021021320 is a wasteful number, since it uses less digits than its factorization.

30531021021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20644397 (or 20644393 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 30531021021320 its reverse (2312012013503), we get a palindrome (32843033034823).

The spelling of 30531021021320 in words is "thirty trillion, five hundred thirty-one billion, twenty-one million, twenty-one thousand, three hundred twenty".