2131021121011 has 4 divisors (see below), whose sum is σ = 2243180127400. Its totient is φ = 2018862114624.

The previous prime is 2131021120993. The next prime is 2131021121027. The reversal of 2131021121011 is 1101211201312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2131021121011 - 2²⁵ = 2130987566579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131021121051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56079503166 + ... + 56079503203.

It is an arithmetic number, because the mean of its divisors is an integer number (560795031850).

Almost surely, 2^{2131021121011} is an apocalyptic number.

2131021121011 is a deficient number, since it is larger than the sum of its proper divisors (112159006389).

2131021121011 is a wasteful number, since it uses less digits than its factorization.

2131021121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112159006388.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 2131021121011 its reverse (1101211201312), we get a palindrome (3232232322323).

The spelling of 2131021121011 in words is "two trillion, one hundred thirty-one billion, twenty-one million, one hundred twenty-one thousand, eleven".