31203444121212 has 48 divisors (see below), whose sum is σ = 79459015289472. Its totient is φ = 9451771673280.

The previous prime is 31203444121211. The next prime is 31203444121231. The reversal of 31203444121212 is 21212144430213.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31203444121212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31203444121211) 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, 47389978 + ... + 48043905.

It is an arithmetic number, because the mean of its divisors is an integer number (1655396151864).

Almost surely, 2^{31203444121212} is an apocalyptic number.

It is an amenable number.

31203444121212 is an abundant number, since it is smaller than the sum of its proper divisors (48255571168260).

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

31203444121212 is a wasteful number, since it uses less digits than its factorization.

31203444121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95436378 (or 95436376 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 31203444121212 its reverse (21212144430213), we get a palindrome (52415588551425).

The spelling of 31203444121212 in words is "thirty-one trillion, two hundred three billion, four hundred forty-four million, one hundred twenty-one thousand, two hundred twelve".