31323220032130 has 64 divisors (see below), whose sum is σ = 60768776301408. Its totient is φ = 11555991982080.

The previous prime is 31323220032101. The next prime is 31323220032131. The reversal of 31323220032130 is 3123002232313.

It can be written as a sum of positive squares in 16 ways, for example, as 3573956221081 + 27749263811049 = 1890491^2 + 5267757^2 .

It is a super-2 number, since 2×31323220032130² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31323220032095 and 31323220032104.

It is not an unprimeable number, because it can be changed into a prime (31323220032131) 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, 943994140 + ... + 944027320.

Almost surely, 2^{31323220032130} is an apocalyptic number.

31323220032130 is a deficient number, since it is larger than the sum of its proper divisors (29445556269278).

31323220032130 is a wasteful number, since it uses less digits than its factorization.

31323220032130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38951.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 31323220032130 its reverse (3123002232313), we get a palindrome (34446222264443).

The spelling of 31323220032130 in words is "thirty-one trillion, three hundred twenty-three billion, two hundred twenty million, thirty-two thousand, one hundred thirty".