31124130420 has 48 divisors (see below), whose sum is σ = 88448286528. Its totient is φ = 8175889920.

The previous prime is 31124130391. The next prime is 31124130421. The reversal of 31124130420 is 2403142113.

It is a super-2 number, since 2×31124130420² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31124130421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3867141 + ... + 3875180.

It is an arithmetic number, because the mean of its divisors is an integer number (1842672636).

Almost surely, 2^31124130420 is an apocalyptic number.

31124130420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31124130420 is an abundant number, since it is smaller than the sum of its proper divisors (57324156108).

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

31124130420 is a wasteful number, since it uses less digits than its factorization.

31124130420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7742400 (or 7742398 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 31124130420 its reverse (2403142113), we get a palindrome (33527272533).

The spelling of 31124130420 in words is "thirty-one billion, one hundred twenty-four million, one hundred thirty thousand, four hundred twenty".