2131102221 has 8 divisors (see below), whose sum is σ = 2857344480. Its totient is φ = 1412797392.

The previous prime is 2131102199. The next prime is 2131102229. The reversal of 2131102221 is 1222011312.

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

It is not a de Polignac number, because 2131102221 - 2⁵ = 2131102189 is a prime.

It is a super-2 number, since 2×2131102221² = 9083193352702265682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2131102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131102229) 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, 1983730 + ... + 1984803.

It is an arithmetic number, because the mean of its divisors is an integer number (357168060).

Almost surely, 2^2131102221 is an apocalyptic number.

It is an amenable number.

2131102221 is a deficient number, since it is larger than the sum of its proper divisors (726242259).

2131102221 is a wasteful number, since it uses less digits than its factorization.

2131102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3968715.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2131102221 is about 46163.8627174980. The cubic root of 2131102221 is about 1286.8702489202.

Adding to 2131102221 its reverse (1222011312), we get a palindrome (3353113533).

Subtracting from 2131102221 its reverse (1222011312), we obtain a palindrome (909090909).

The spelling of 2131102221 in words is "two billion, one hundred thirty-one million, one hundred two thousand, two hundred twenty-one".