31211032130 has 16 divisors (see below), whose sum is σ = 56181894840. Its totient is φ = 12483960192.

The previous prime is 31211032121. The next prime is 31211032163. The reversal of 31211032130 is 3123011213.

It can be written as a sum of positive squares in 4 ways, for example, as 27844595689 + 3366436441 = 166867^2 + 58021^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31211032099 and 31211032108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443312 + ... + 508868.

Almost surely, 2^31211032130 is an apocalyptic number.

31211032130 is a deficient number, since it is larger than the sum of its proper divisors (24970862710).

31211032130 is a wasteful number, since it uses less digits than its factorization.

31211032130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113173.

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

Adding to 31211032130 its reverse (3123011213), we get a palindrome (34334043343).

The spelling of 31211032130 in words is "thirty-one billion, two hundred eleven million, thirty-two thousand, one hundred thirty".