31120001221212 has 72 divisors (see below), whose sum is σ = 78955078902336. Its totient is φ = 10335070018944.

The previous prime is 31120001221207. The next prime is 31120001221213. The reversal of 31120001221212 is 21212210002113.

31120001221212 is a `hidden beast` number, since 31 + 1 + 200 + 0 + 1 + 221 + 212 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120001221213) 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, 10914733 + ... + 13467419.

It is an arithmetic number, because the mean of its divisors is an integer number (1096598318088).

Almost surely, 2^{31120001221212} is an apocalyptic number.

It is an amenable number.

31120001221212 is an abundant number, since it is smaller than the sum of its proper divisors (47835077681124).

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

31120001221212 is a wasteful number, since it uses less digits than its factorization.

31120001221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2553947 (or 2553942 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 31120001221212 its reverse (21212210002113), we get a palindrome (52332211223325).

The spelling of 31120001221212 in words is "thirty-one trillion, one hundred twenty billion, one million, two hundred twenty-one thousand, two hundred twelve".