2021131373 has 2 divisors, whose sum is σ = 2021131374. Its totient is φ = 2021131372.

The previous prime is 2021131351. The next prime is 2021131379. The reversal of 2021131373 is 3731311202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1852183369 + 168948004 = 43037^2 + 12998^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021131373 - 2²⁰ = 2020082797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021131379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010565686 + 1010565687.

It is an arithmetic number, because the mean of its divisors is an integer number (1010565687).

Almost surely, 2^2021131373 is an apocalyptic number.

It is an amenable number.

2021131373 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021131373 is an equidigital number, since it uses as much as digits as its factorization.

2021131373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 2021131373 is about 44956.9947060521. The cubic root of 2021131373 is about 1264.3428235187.

Adding to 2021131373 its reverse (3731311202), we get a palindrome (5752442575).

The spelling of 2021131373 in words is "two billion, twenty-one million, one hundred thirty-one thousand, three hundred seventy-three".