2131121312331 has 16 divisors (see below), whose sum is σ = 3152352021120. Its totient is φ = 1269697339520.

The previous prime is 2131121312263. The next prime is 2131121312371. The reversal of 2131121312331 is 1332131211312.

It is a cyclic number.

It is not a de Polignac number, because 2131121312331 - 2¹³ = 2131121304139 is a prime.

It is a super-2 number, since 2×2131121312331² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2131121312371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 547281390 + ... + 547285283.

It is an arithmetic number, because the mean of its divisors is an integer number (197022001320).

Almost surely, 2^{2131121312331} is an apocalyptic number.

2131121312331 is a deficient number, since it is larger than the sum of its proper divisors (1021230708789).

2131121312331 is a wasteful number, since it uses less digits than its factorization.

2131121312331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094566746.

The product of its digits is 648, while the sum is 24.

Adding to 2131121312331 its reverse (1332131211312), we get a palindrome (3463252523643).

The spelling of 2131121312331 in words is "two trillion, one hundred thirty-one billion, one hundred twenty-one million, three hundred twelve thousand, three hundred thirty-one".