2131012121 has 16 divisors (see below), whose sum is σ = 2472677376. Its totient is φ = 1798868736.

The previous prime is 2131012099. The next prime is 2131012157. The reversal of 2131012121 is 1212101312.

It is not a de Polignac number, because 2131012121 - 2⁶ = 2131012057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131012096 and 2131012105.

It is not an unprimeable number, because it can be changed into a prime (2131012171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113045 + ... + 130541.

It is an arithmetic number, because the mean of its divisors is an integer number (154542336).

Almost surely, 2^2131012121 is an apocalyptic number.

It is an amenable number.

2131012121 is a deficient number, since it is larger than the sum of its proper divisors (341665255).

2131012121 is a wasteful number, since it uses less digits than its factorization.

2131012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17768.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 2131012121 is about 46162.8868356389. The cubic root of 2131012121 is about 1286.8521129774.

Adding to 2131012121 its reverse (1212101312), we get a palindrome (3343113433).

The spelling of 2131012121 in words is "two billion, one hundred thirty-one million, twelve thousand, one hundred twenty-one".