1321021020331 has 8 divisors (see below), whose sum is σ = 1443848402304. Its totient is φ = 1203207000960.

The previous prime is 1321021020323. The next prime is 1321021020383. The reversal of 1321021020331 is 1330201201231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321021020331 - 2³ = 1321021020323 is a prime.

It is a super-2 number, since 2×1321021020331² (a number of 25 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 = 1321021020299 and 1321021020308.

It is not an unprimeable number, because it can be changed into a prime (1321021023331) 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, 1253340100 + ... + 1253341153.

It is an arithmetic number, because the mean of its divisors is an integer number (180481050288).

Almost surely, 2^{1321021020331} is an apocalyptic number.

1321021020331 is a deficient number, since it is larger than the sum of its proper divisors (122827381973).

1321021020331 is a wasteful number, since it uses less digits than its factorization.

1321021020331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506681301.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1321021020331 its reverse (1330201201231), we get a palindrome (2651222221562).

The spelling of 1321021020331 in words is "one trillion, three hundred twenty-one billion, twenty-one million, twenty thousand, three hundred thirty-one".