31020321122230 has 32 divisors (see below), whose sum is σ = 63561005814528. Its totient is φ = 10789676911200.

The previous prime is 31020321122221. The next prime is 31020321122233. The reversal of 31020321122230 is 3222112302013.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020321122233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6130495716 + ... + 6130500775.

It is an arithmetic number, because the mean of its divisors is an integer number (1986281431704).

Almost surely, 2^{31020321122230} is an apocalyptic number.

31020321122230 is an abundant number, since it is smaller than the sum of its proper divisors (32540684692298).

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

31020321122230 is a wasteful number, since it uses less digits than its factorization.

31020321122230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12260996532.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31020321122230 its reverse (3222112302013), we get a palindrome (34242433424243).

The spelling of 31020321122230 in words is "thirty-one trillion, twenty billion, three hundred twenty-one million, one hundred twenty-two thousand, two hundred thirty".