31321220102030 has 16 divisors (see below), whose sum is σ = 56454486042960. Its totient is φ = 12511534738752.

The previous prime is 31321220102023. The next prime is 31321220102033. The reversal of 31321220102030 is 3020102212313.

It is a super-2 number, since 2×31321220102030² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31321220101993 and 31321220102011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321220102033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2119154999 + ... + 2119169778.

It is an arithmetic number, because the mean of its divisors is an integer number (3528405377685).

Almost surely, 2^{31321220102030} is an apocalyptic number.

31321220102030 is a deficient number, since it is larger than the sum of its proper divisors (25133265940930).

31321220102030 is a wasteful number, since it uses less digits than its factorization.

31321220102030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4238325523.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31321220102030 its reverse (3020102212313), we get a palindrome (34341322314343).

The spelling of 31321220102030 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred twenty million, one hundred two thousand, thirty".