1202131321 has 4 divisors (see below), whose sum is σ = 1202992000. Its totient is φ = 1201270644.

The previous prime is 1202131309. The next prime is 1202131367. The reversal of 1202131321 is 1231312021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1202131321 - 2⁵ = 1202131289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202131295 and 1202131304.

It is not an unprimeable number, because it can be changed into a prime (1202135321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428241 + ... + 431038.

It is an arithmetic number, because the mean of its divisors is an integer number (300748000).

Almost surely, 2^1202131321 is an apocalyptic number.

It is an amenable number.

1202131321 is a deficient number, since it is larger than the sum of its proper divisors (860679).

1202131321 is an equidigital number, since it uses as much as digits as its factorization.

1202131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860678.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1202131321 is about 34671.7654727878. The cubic root of 1202131321 is about 1063.2873266739.

Adding to 1202131321 its reverse (1231312021), we get a palindrome (2433443342).

The spelling of 1202131321 in words is "one billion, two hundred two million, one hundred thirty-one thousand, three hundred twenty-one".