2130222121 has 4 divisors (see below), whose sum is σ = 2145547600. Its totient is φ = 2114896644.

The previous prime is 2130222097. The next prime is 2130222131. The reversal of 2130222121 is 1212220312.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 2130222121 - 2⁵ = 2130222089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2130222095 and 2130222104.

It is not an unprimeable number, because it can be changed into a prime (2130222131) 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, 7662531 + ... + 7662808.

It is an arithmetic number, because the mean of its divisors is an integer number (536386900).

Almost surely, 2^2130222121 is an apocalyptic number.

It is an amenable number.

2130222121 is a deficient number, since it is larger than the sum of its proper divisors (15325479).

2130222121 is a wasteful number, since it uses less digits than its factorization.

2130222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15325478.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2130222121 is about 46154.3293852267. The cubic root of 2130222121 is about 1286.6930744921.

Adding to 2130222121 its reverse (1212220312), we get a palindrome (3342442433).

The spelling of 2130222121 in words is "two billion, one hundred thirty million, two hundred twenty-two thousand, one hundred twenty-one".