2131013213121 has 32 divisors (see below), whose sum is σ = 3151169280000. Its totient is φ = 1272847088448.

The previous prime is 2131013213111. The next prime is 2131013213137. The reversal of 2131013213121 is 1213123101312.

It is not a de Polignac number, because 2131013213121 - 2¹⁵ = 2131013180353 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2131013213111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5679771 + ... + 6043328.

It is an arithmetic number, because the mean of its divisors is an integer number (98474040000).

Almost surely, 2^{2131013213121} is an apocalyptic number.

It is an amenable number.

2131013213121 is a deficient number, since it is larger than the sum of its proper divisors (1020156066879).

2131013213121 is a wasteful number, since it uses less digits than its factorization.

2131013213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11723253.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 2131013213121 its reverse (1213123101312), we get a palindrome (3344136314433).

The spelling of 2131013213121 in words is "two trillion, one hundred thirty-one billion, thirteen million, two hundred thirteen thousand, one hundred twenty-one".