31242121310 has 32 divisors (see below), whose sum is σ = 56970224640. Its totient is φ = 12333773088.

The previous prime is 31242121307. The next prime is 31242121321. The reversal of 31242121310 is 1312124213.

It is a super-2 number, since 2×31242121310² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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, 2492519 + ... + 2505021.

It is an arithmetic number, because the mean of its divisors is an integer number (1780319520).

Almost surely, 2^31242121310 is an apocalyptic number.

31242121310 is a deficient number, since it is larger than the sum of its proper divisors (25728103330).

31242121310 is a wasteful number, since it uses less digits than its factorization.

31242121310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15752.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31242121310 its reverse (1312124213), we get a palindrome (32554245523).

The spelling of 31242121310 in words is "thirty-one billion, two hundred forty-two million, one hundred twenty-one thousand, three hundred ten".