2131102232121 has 4 divisors (see below), whose sum is σ = 2841469642832. Its totient is φ = 1420734821412.

The previous prime is 2131102232107. The next prime is 2131102232131. The reversal of 2131102232121 is 1212322011312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2131102232121 - 2¹⁷ = 2131102101049 is a prime.

It is a super-2 number, since 2×2131102232121² (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 (2131102232131) 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, 355183705351 + ... + 355183705356.

It is an arithmetic number, because the mean of its divisors is an integer number (710367410708).

Almost surely, 2^{2131102232121} is an apocalyptic number.

It is an amenable number.

2131102232121 is a deficient number, since it is larger than the sum of its proper divisors (710367410711).

2131102232121 is an equidigital number, since it uses as much as digits as its factorization.

2131102232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710367410710.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 2131102232121 its reverse (1212322011312), we get a palindrome (3343424243433).

The spelling of 2131102232121 in words is "two trillion, one hundred thirty-one billion, one hundred two million, two hundred thirty-two thousand, one hundred twenty-one".