31010124420 has 108 divisors (see below), whose sum is σ = 103392782220. Its totient is φ = 7517600640.

The previous prime is 31010124419. The next prime is 31010124433. The reversal of 31010124420 is 2442101013.

It can be written as a sum of positive squares in 2 ways, for example, as 18701109504 + 12309014916 = 136752^2 + 110946^2 .

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 = 31010124393 and 31010124402.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 690115 + ... + 733674.

Almost surely, 2^31010124420 is an apocalyptic number.

31010124420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31010124420 is an abundant number, since it is smaller than the sum of its proper divisors (72382657800).

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

31010124420 is a wasteful number, since it uses less digits than its factorization.

31010124420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423826 (or 1423810 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 31010124420 its reverse (2442101013), we get a palindrome (33452225433).

The spelling of 31010124420 in words is "thirty-one billion, ten million, one hundred twenty-four thousand, four hundred twenty".