31113001301220 has 72 divisors (see below), whose sum is σ = 96926809479864. Its totient is φ = 8072562498048.

The previous prime is 31113001301209. The next prime is 31113001301267. The reversal of 31113001301220 is 2210310031113.

31113001301220 is a `hidden beast` number, since 3 + 1 + 11 + 300 + 130 + 1 + 220 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7677565388964 + 23435435912256 = 2770842^2 + 4841016^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31113001301193 and 31113001301202.

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 23 ways as a sum of consecutive naturals, for example, 2335804249 + ... + 2335817568.

Almost surely, 2^{31113001301220} is an apocalyptic number.

31113001301220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31113001301220 is an abundant number, since it is smaller than the sum of its proper divisors (65813808178644).

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

31113001301220 is a wasteful number, since it uses less digits than its factorization.

31113001301220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4671621869 (or 4671621864 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31113001301220 its reverse (2210310031113), we get a palindrome (33323311332333).

The spelling of 31113001301220 in words is "thirty-one trillion, one hundred thirteen billion, one million, three hundred one thousand, two hundred twenty".