2122166121 has 4 divisors (see below), whose sum is σ = 2829554832. Its totient is φ = 1414777412.

The previous prime is 2122166119. The next prime is 2122166141. The reversal of 2122166121 is 1216612212.

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 2122166121 - 2¹ = 2122166119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2122166091 and 2122166100.

It is not an unprimeable number, because it can be changed into a prime (2122166141) 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, 353694351 + ... + 353694356.

It is an arithmetic number, because the mean of its divisors is an integer number (707388708).

Almost surely, 2^2122166121 is an apocalyptic number.

It is an amenable number.

2122166121 is a deficient number, since it is larger than the sum of its proper divisors (707388711).

2122166121 is an equidigital number, since it uses as much as digits as its factorization.

2122166121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707388710.

The product of its digits is 576, while the sum is 24.

The square root of 2122166121 is about 46066.9742982975. The cubic root of 2122166121 is about 1285.0690351360.

Adding to 2122166121 its reverse (1216612212), we get a palindrome (3338778333).

The spelling of 2122166121 in words is "two billion, one hundred twenty-two million, one hundred sixty-six thousand, one hundred twenty-one".