1320311132021 has 64 divisors (see below), whose sum is σ = 1632088313856. Its totient is φ = 1043664652800.

The previous prime is 1320311132003. The next prime is 1320311132047. The reversal of 1320311132021 is 1202311130231.

It is a happy number.

It is not a de Polignac number, because 1320311132021 - 2⁶ = 1320311131957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1320311131984 and 1320311132002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320311132321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 171665786 + ... + 171673476.

It is an arithmetic number, because the mean of its divisors is an integer number (25501379904).

Almost surely, 2^{1320311132021} is an apocalyptic number.

It is an amenable number.

1320311132021 is a deficient number, since it is larger than the sum of its proper divisors (311777181835).

1320311132021 is a wasteful number, since it uses less digits than its factorization.

1320311132021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8082.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1320311132021 its reverse (1202311130231), we get a palindrome (2522622262252).

The spelling of 1320311132021 in words is "one trillion, three hundred twenty billion, three hundred eleven million, one hundred thirty-two thousand, twenty-one".