2021001023131 has 4 divisors (see below), whose sum is σ = 2021147179200. Its totient is φ = 2020854867064.

The previous prime is 2021001023117. The next prime is 2021001023213. The reversal of 2021001023131 is 1313201001202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2021001023131 - 2⁹ = 2021001022619 is a prime.

It is a super-2 number, since 2×2021001023131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021001020131) 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, 73057291 + ... + 73084948.

It is an arithmetic number, because the mean of its divisors is an integer number (505286794800).

Almost surely, 2^{2021001023131} is an apocalyptic number.

2021001023131 is a deficient number, since it is larger than the sum of its proper divisors (146156069).

2021001023131 is a wasteful number, since it uses less digits than its factorization.

2021001023131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146156068.

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

Adding to 2021001023131 its reverse (1313201001202), we get a palindrome (3334202024333).

The spelling of 2021001023131 in words is "two trillion, twenty-one billion, one million, twenty-three thousand, one hundred thirty-one".