31121242024 has 8 divisors (see below), whose sum is σ = 58352328810. Its totient is φ = 15560621008.

The previous prime is 31121242021. The next prime is 31121242037. The reversal of 31121242024 is 42024212113.

It can be written as a sum of positive squares in only one way, i.e., 23143536900 + 7977705124 = 152130^2 + 89318^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 31121241986 and 31121242004.

It is not an unprimeable number, because it can be changed into a prime (31121242021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1945077619 + ... + 1945077634.

Almost surely, 2^31121242024 is an apocalyptic number.

It is an amenable number.

31121242024 is a deficient number, since it is larger than the sum of its proper divisors (27231086786).

31121242024 is a wasteful number, since it uses less digits than its factorization.

31121242024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3890155259 (or 3890155255 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 31121242024 its reverse (42024212113), we get a palindrome (73145454137).

The spelling of 31121242024 in words is "thirty-one billion, one hundred twenty-one million, two hundred forty-two thousand, twenty-four".