222212222220121 has 4 divisors (see below), whose sum is σ = 253956825394432. Its totient is φ = 190467619045812.

The previous prime is 222212222220071. The next prime is 222212222220127. The reversal of 222212222220121 is 121022222212222.

222212222220121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 222212222220121 - 2¹⁵ = 222212222187353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222212222220127) 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, 15872301587145 + ... + 15872301587158.

It is an arithmetic number, because the mean of its divisors is an integer number (63489206348608).

Almost surely, 2^{222212222220121} is an apocalyptic number.

It is an amenable number.

222212222220121 is a deficient number, since it is larger than the sum of its proper divisors (31744603174311).

222212222220121 is an equidigital number, since it uses as much as digits as its factorization.

222212222220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31744603174310.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 222212222220121 its reverse (121022222212222), we get a palindrome (343234444432343).

The spelling of 222212222220121 in words is "two hundred twenty-two trillion, two hundred twelve billion, two hundred twenty-two million, two hundred twenty thousand, one hundred twenty-one".