31023200011212 has 72 divisors (see below), whose sum is σ = 81472056906240. Its totient is φ = 9941626248960.

The previous prime is 31023200011211. The next prime is 31023200011249. The reversal of 31023200011212 is 21211000232013.

31023200011212 is a `hidden beast` number, since 310 + 2 + 320 + 0 + 0 + 11 + 21 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31023200011211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63524364 + ... + 64010867.

It is an arithmetic number, because the mean of its divisors is an integer number (1131556345920).

Almost surely, 2^{31023200011212} is an apocalyptic number.

It is an amenable number.

31023200011212 is an abundant number, since it is smaller than the sum of its proper divisors (50448856895028).

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

31023200011212 is a wasteful number, since it uses less digits than its factorization.

31023200011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127535503 (or 127535498 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31023200011212 its reverse (21211000232013), we get a palindrome (52234200243225).

The spelling of 31023200011212 in words is "thirty-one trillion, twenty-three billion, two hundred million, eleven thousand, two hundred twelve".