202222012121 has 4 divisors (see below), whose sum is σ = 202223067600. Its totient is φ = 202220956644.

The previous prime is 202222012019. The next prime is 202222012127. The reversal of 202222012121 is 121210222202.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 202222012121 - 2¹⁴ = 202221995737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202222012121.

It is not an unprimeable number, because it can be changed into a prime (202222012127) 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, 150431 + ... + 653508.

It is an arithmetic number, because the mean of its divisors is an integer number (50555766900).

Almost surely, 2^202222012121 is an apocalyptic number.

It is an amenable number.

202222012121 is a deficient number, since it is larger than the sum of its proper divisors (1055479).

202222012121 is an equidigital number, since it uses as much as digits as its factorization.

202222012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055478.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202222012121 its reverse (121210222202), we get a palindrome (323432234323).

The spelling of 202222012121 in words is "two hundred two billion, two hundred twenty-two million, twelve thousand, one hundred twenty-one".