31201211112 has 32 divisors (see below), whose sum is σ = 80111220000. Its totient is φ = 10119311424.

The previous prime is 31201211089. The next prime is 31201211113. The reversal of 31201211112 is 21111210213.

It is a junction number, because it is equal to n+sod(n) for n = 31201211091 and 31201211100.

It is not an unprimeable number, because it can be changed into a prime (31201211113) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 17567362 + ... + 17569137.

It is an arithmetic number, because the mean of its divisors is an integer number (2503475625).

Almost surely, 2^31201211112 is an apocalyptic number.

It is an amenable number.

31201211112 is an abundant number, since it is smaller than the sum of its proper divisors (48910008888).

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

31201211112 is a wasteful number, since it uses less digits than its factorization.

31201211112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35136545 (or 35136541 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 31201211112 its reverse (21111210213), we get a palindrome (52312421325).

The spelling of 31201211112 in words is "thirty-one billion, two hundred one million, two hundred eleven thousand, one hundred twelve".