2131111122121 has 8 divisors (see below), whose sum is σ = 2140636698144. Its totient is φ = 2121586752000.

The previous prime is 2131111122109. The next prime is 2131111122131. The reversal of 2131111122121 is 1212211111312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2131111122121 - 2⁹ = 2131111121609 is a prime.

It is a super-2 number, since 2×2131111122121² (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 (2131111122131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3338866 + ... + 3925588.

It is an arithmetic number, because the mean of its divisors is an integer number (267579587268).

Almost surely, 2^{2131111122121} is an apocalyptic number.

It is an amenable number.

2131111122121 is a deficient number, since it is larger than the sum of its proper divisors (9525576023).

2131111122121 is a wasteful number, since it uses less digits than its factorization.

2131111122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602951.

The product of its digits is 48, while the sum is 19.

Adding to 2131111122121 its reverse (1212211111312), we get a palindrome (3343322233433).

The spelling of 2131111122121 in words is "two trillion, one hundred thirty-one billion, one hundred eleven million, one hundred twenty-two thousand, one hundred twenty-one".