2021121340131 has 16 divisors (see below), whose sum is σ = 2707128103680. Its totient is φ = 1341278177760.

The previous prime is 2021121340129. The next prime is 2021121340157. The reversal of 2021121340131 is 1310431211202.

It is not a de Polignac number, because 2021121340131 - 2¹ = 2021121340129 is a prime.

It is a super-2 number, since 2×2021121340131² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021121340098 and 2021121340107.

It is not an unprimeable number, because it can be changed into a prime (2021121340331) 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, 1134565 + ... + 2308566.

It is an arithmetic number, because the mean of its divisors is an integer number (169195506480).

Almost surely, 2^{2021121340131} is an apocalyptic number.

2021121340131 is a deficient number, since it is larger than the sum of its proper divisors (686006763549).

2021121340131 is a wasteful number, since it uses less digits than its factorization.

2021121340131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3444026.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 2021121340131 its reverse (1310431211202), we get a palindrome (3331552551333).

The spelling of 2021121340131 in words is "two trillion, twenty-one billion, one hundred twenty-one million, three hundred forty thousand, one hundred thirty-one".