222101110212121 has 4 divisors (see below), whose sum is σ = 253829840242432. Its totient is φ = 190372380181812.

The previous prime is 222101110212103. The next prime is 222101110212187. The reversal of 222101110212121 is 121212011101222.

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 222101110212121 - 2²⁵ = 222101076657689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222101110212101) 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, 15864365015145 + ... + 15864365015158.

It is an arithmetic number, because the mean of its divisors is an integer number (63457460060608).

Almost surely, 2^{222101110212121} is an apocalyptic number.

It is an amenable number.

222101110212121 is a deficient number, since it is larger than the sum of its proper divisors (31728730030311).

222101110212121 is an equidigital number, since it uses as much as digits as its factorization.

222101110212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31728730030310.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 222101110212121 its reverse (121212011101222), we get a palindrome (343313121313343).

The spelling of 222101110212121 in words is "two hundred twenty-two trillion, one hundred one billion, one hundred ten million, two hundred twelve thousand, one hundred twenty-one".