31021131230 has 8 divisors (see below), whose sum is σ = 55838036232. Its totient is φ = 12408452488.

The previous prime is 31021131179. The next prime is 31021131233. The reversal of 31021131230 is 3213112013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 31021131199 and 31021131208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31021131233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1551056552 + ... + 1551056571.

It is an arithmetic number, because the mean of its divisors is an integer number (6979754529).

Almost surely, 2^31021131230 is an apocalyptic number.

31021131230 is a deficient number, since it is larger than the sum of its proper divisors (24816905002).

31021131230 is a wasteful number, since it uses less digits than its factorization.

31021131230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102113130.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31021131230 its reverse (3213112013), we get a palindrome (34234243243).

The spelling of 31021131230 in words is "thirty-one billion, twenty-one million, one hundred thirty-one thousand, two hundred thirty".