1202311331021 has 16 divisors (see below), whose sum is σ = 1220258547648. Its totient is φ = 1184448672000.

The previous prime is 1202311330951. The next prime is 1202311331033. The reversal of 1202311331021 is 1201331132021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1202311331021 - 2³⁴ = 1185131461837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202311330984 and 1202311331002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202311333021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145009886 + ... + 145018176.

It is an arithmetic number, because the mean of its divisors is an integer number (76266159228).

Almost surely, 2^{1202311331021} is an apocalyptic number.

It is an amenable number.

1202311331021 is a deficient number, since it is larger than the sum of its proper divisors (17947216627).

1202311331021 is an equidigital number, since it uses as much as digits as its factorization.

1202311331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13132.

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

Adding to 1202311331021 its reverse (1201331132021), we get a palindrome (2403642463042).

The spelling of 1202311331021 in words is "one trillion, two hundred two billion, three hundred eleven million, three hundred thirty-one thousand, twenty-one".