2222202121 has 4 divisors (see below), whose sum is σ = 2223268992. Its totient is φ = 2221135252.

The previous prime is 2222202119. The next prime is 2222202181. The reversal of 2222202121 is 1212022222.

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 2222202121 - 2¹ = 2222202119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2222202095 and 2222202104.

It is not an unprimeable number, because it can be changed into a prime (2222202181) 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, 530305 + ... + 534478.

It is an arithmetic number, because the mean of its divisors is an integer number (555817248).

Almost surely, 2^2222202121 is an apocalyptic number.

It is an amenable number.

2222202121 is a deficient number, since it is larger than the sum of its proper divisors (1066871).

2222202121 is a wasteful number, since it uses less digits than its factorization.

2222202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066870.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2222202121 is about 47140.2388729629. The cubic root of 2222202121 is about 1304.9519456965.

Adding to 2222202121 its reverse (1212022222), we get a palindrome (3434224343).

The spelling of 2222202121 in words is "two billion, two hundred twenty-two million, two hundred two thousand, one hundred twenty-one".