31042211212 has 48 divisors (see below), whose sum is σ = 57037881600. Its totient is φ = 14764953600.

The previous prime is 31042211203. The next prime is 31042211219. The reversal of 31042211212 is 21211224013.

It is a self number, because there is not a number n which added to its sum of digits gives 31042211212.

It is not an unprimeable number, because it can be changed into a prime (31042211219) 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, 1783512 + ... + 1800832.

It is an arithmetic number, because the mean of its divisors is an integer number (1188289200).

Almost surely, 2^31042211212 is an apocalyptic number.

It is an amenable number.

31042211212 is a deficient number, since it is larger than the sum of its proper divisors (25995670388).

31042211212 is a wasteful number, since it uses less digits than its factorization.

31042211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17602 (or 17600 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 31042211212 its reverse (21211224013), we get a palindrome (52253435225).

The spelling of 31042211212 in words is "thirty-one billion, forty-two million, two hundred eleven thousand, two hundred twelve".