321320021132131 has 32 divisors (see below), whose sum is σ = 393563958773760. Its totient is φ = 256310447855616.

The previous prime is 321320021132107. The next prime is 321320021132167. The reversal of 321320021132131 is 131231120023123.

It is not a de Polignac number, because 321320021132131 - 2¹¹ = 321320021130083 is a prime.

It is a super-2 number, since 2×321320021132131² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321320021132096 and 321320021132105.

It is not an unprimeable number, because it can be changed into a prime (321320021133131) 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, 127236130 + ... + 129736936.

It is an arithmetic number, because the mean of its divisors is an integer number (12298873711680).

Almost surely, 2^{321320021132131} is an apocalyptic number.

321320021132131 is a deficient number, since it is larger than the sum of its proper divisors (72243937641629).

321320021132131 is a wasteful number, since it uses less digits than its factorization.

321320021132131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522443.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 321320021132131 its reverse (131231120023123), we get a palindrome (452551141155254).

The spelling of 321320021132131 in words is "three hundred twenty-one trillion, three hundred twenty billion, twenty-one million, one hundred thirty-two thousand, one hundred thirty-one".