31302010221012 has 36 divisors (see below), whose sum is σ = 79135637919156. Its totient is φ = 10432538077440.

The previous prime is 31302010220989. The next prime is 31302010221049. The reversal of 31302010221012 is 21012201020313.

It can be written as a sum of positive squares in 2 ways, for example, as 198144277956 + 31103865943056 = 445134^2 + 5577084^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60795483 + ... + 61308194.

It is an arithmetic number, because the mean of its divisors is an integer number (2198212164421).

Almost surely, 2^{31302010221012} is an apocalyptic number.

It is an amenable number.

31302010221012 is an abundant number, since it is smaller than the sum of its proper divisors (47833627698144).

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

31302010221012 is a wasteful number, since it uses less digits than its factorization.

31302010221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122110808 (or 122110803 counting only the distinct ones).

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

Adding to 31302010221012 its reverse (21012201020313), we get a palindrome (52314211241325).

The spelling of 31302010221012 in words is "thirty-one trillion, three hundred two billion, ten million, two hundred twenty-one thousand, twelve".