31033132212 has 96 divisors (see below), whose sum is σ = 77027328000. Its totient is φ = 9696931200.

The previous prime is 31033132177. The next prime is 31033132217. The reversal of 31033132212 is 21223133013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31033132217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8664262 + ... + 8667842.

It is an arithmetic number, because the mean of its divisors is an integer number (802368000).

Almost surely, 2^31033132212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31033132212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38513664000).

31033132212 is an abundant number, since it is smaller than the sum of its proper divisors (45994195788).

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

31033132212 is a wasteful number, since it uses less digits than its factorization.

31033132212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3997 (or 3995 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31033132212 its reverse (21223133013), we get a palindrome (52256265225).

The spelling of 31033132212 in words is "thirty-one billion, thirty-three million, one hundred thirty-two thousand, two hundred twelve".