31110221133212 has 48 divisors (see below), whose sum is σ = 62827620039072. Its totient is φ = 13351123599360.

The previous prime is 31110221133209. The next prime is 31110221133247. The reversal of 31110221133212 is 21233112201113.

It is a happy 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, 211929989 + ... + 212076732.

It is an arithmetic number, because the mean of its divisors is an integer number (1308908750814).

Almost surely, 2^{31110221133212} is an apocalyptic number.

It is an amenable number.

31110221133212 is an abundant number, since it is smaller than the sum of its proper divisors (31717398905860).

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

31110221133212 is a wasteful number, since it uses less digits than its factorization.

31110221133212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424006838 (or 424006836 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 31110221133212 its reverse (21233112201113), we get a palindrome (52343333334325).

The spelling of 31110221133212 in words is "thirty-one trillion, one hundred ten billion, two hundred twenty-one million, one hundred thirty-three thousand, two hundred twelve".