31232133123212 has 144 divisors (see below), whose sum is σ = 67645485734400. Its totient is φ = 12334142709504.

The previous prime is 31232133123197. The next prime is 31232133123223. The reversal of 31232133123212 is 21232133123213.

It is a super-2 number, since 2×31232133123212² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 86745539 + ... + 87104837.

It is an arithmetic number, because the mean of its divisors is an integer number (469760317600).

Almost surely, 2^{31232133123212} 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 31232133123212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33822742867200).

31232133123212 is an abundant number, since it is smaller than the sum of its proper divisors (36413352611188).

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

31232133123212 is a wasteful number, since it uses less digits than its factorization.

31232133123212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359492 (or 359447 counting only the distinct ones).

The product of its digits is 7776, while the sum is 29.

Adding to 31232133123212 its reverse (21232133123213), we get a palindrome (52464266246425).

Subtracting from 31232133123212 its reverse (21232133123213), we obtain a palindrome (9999999999999).

The spelling of 31232133123212 in words is "thirty-one trillion, two hundred thirty-two billion, one hundred thirty-three million, one hundred twenty-three thousand, two hundred twelve".