31320101121220 has 48 divisors (see below), whose sum is σ = 68343525282816. Its totient is φ = 12043619280000.

The previous prime is 31320101121193. The next prime is 31320101121247. The reversal of 31320101121220 is 2212110102313.

It is an interprime number because it is at equal distance from previous prime (31320101121193) and next prime (31320101121247).

It is a super-2 number, since 2×31320101121220² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167178871 + ... + 167366110.

It is an arithmetic number, because the mean of its divisors is an integer number (1423823443392).

Almost surely, 2^{31320101121220} is an apocalyptic number.

It is an amenable number.

31320101121220 is an abundant number, since it is smaller than the sum of its proper divisors (37023424161596).

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

31320101121220 is a wasteful number, since it uses less digits than its factorization.

31320101121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334545172 (or 334545170 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 31320101121220 its reverse (2212110102313), we get a palindrome (33532211223533).

The spelling of 31320101121220 in words is "thirty-one trillion, three hundred twenty billion, one hundred one million, one hundred twenty-one thousand, two hundred twenty".