31210421242 has 128 divisors (see below), whose sum is σ = 65150926848. Its totient is φ = 10817971200.

The previous prime is 31210421239. The next prime is 31210421257. The reversal of 31210421242 is 24212401213.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17562658 + ... + 17564434.

It is an arithmetic number, because the mean of its divisors is an integer number (508991616).

Almost surely, 2^31210421242 is an apocalyptic number.

31210421242 is an abundant number, since it is smaller than the sum of its proper divisors (33940505606).

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

31210421242 is a wasteful number, since it uses less digits than its factorization.

31210421242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124.

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

Adding to 31210421242 its reverse (24212401213), we get a palindrome (55422822455).

The spelling of 31210421242 in words is "thirty-one billion, two hundred ten million, four hundred twenty-one thousand, two hundred forty-two".