321103131021 has 12 divisors (see below), whose sum is σ = 468407869020. Its totient is φ = 211949260800.

The previous prime is 321103130993. The next prime is 321103131059. The reversal of 321103131021 is 120131301123.

321103131021 is a `hidden beast` number, since 321 + 1 + 0 + 31 + 310 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 272051955396 + 49051175625 = 521586^2 + 221475^2 .

It is not a de Polignac number, because 321103131021 - 2¹³ = 321103122829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321103130985 and 321103131003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321103131071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 176623476 + ... + 176625293.

It is an arithmetic number, because the mean of its divisors is an integer number (39033989085).

Almost surely, 2^321103131021 is an apocalyptic number.

It is an amenable number.

321103131021 is a deficient number, since it is larger than the sum of its proper divisors (147304737999).

321103131021 is a wasteful number, since it uses less digits than its factorization.

321103131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353248876 (or 353248873 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 321103131021 its reverse (120131301123), we get a palindrome (441234432144).

The spelling of 321103131021 in words is "three hundred twenty-one billion, one hundred three million, one hundred thirty-one thousand, twenty-one".