2131123333121 has 32 divisors (see below), whose sum is σ = 2261952000000. Its totient is φ = 2005371648000.

The previous prime is 2131123333109. The next prime is 2131123333147. The reversal of 2131123333121 is 1213333211312.

It is a cyclic number.

It is not a de Polignac number, because 2131123333121 - 2¹⁸ = 2131123070977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131123333621) 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, 68182505 + ... + 68213753.

It is an arithmetic number, because the mean of its divisors is an integer number (70686000000).

Almost surely, 2^{2131123333121} is an apocalyptic number.

It is an amenable number.

2131123333121 is a deficient number, since it is larger than the sum of its proper divisors (130828666879).

2131123333121 is a wasteful number, since it uses less digits than its factorization.

2131123333121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31817.

The product of its digits is 1944, while the sum is 26.

Adding to 2131123333121 its reverse (1213333211312), we get a palindrome (3344456544433).

The spelling of 2131123333121 in words is "two trillion, one hundred thirty-one billion, one hundred twenty-three million, three hundred thirty-three thousand, one hundred twenty-one".