31201331022012 has 96 divisors (see below), whose sum is σ = 77622497568000. Its totient is φ = 9726879831552.

The previous prime is 31201331022011. The next prime is 31201331022077. The reversal of 31201331022012 is 21022013310213.

It is a self number, because there is not a number n which added to its sum of digits gives 31201331022012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31201331022011) 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, 2720128 + ... + 8354744.

It is an arithmetic number, because the mean of its divisors is an integer number (808567683000).

Almost surely, 2^{31201331022012} 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 31201331022012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38811248784000).

31201331022012 is an abundant number, since it is smaller than the sum of its proper divisors (46421166545988).

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

31201331022012 is a wasteful number, since it uses less digits than its factorization.

31201331022012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5634955 (or 5634953 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31201331022012 its reverse (21022013310213), we get a palindrome (52223344332225).

The spelling of 31201331022012 in words is "thirty-one trillion, two hundred one billion, three hundred thirty-one million, twenty-two thousand, twelve".