222101121221201 has 4 divisors (see below), whose sum is σ = 224777038344432. Its totient is φ = 219425204097972.

The previous prime is 222101121221191. The next prime is 222101121221267. The reversal of 222101121221201 is 102122121101222.

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 a de Polignac number, because none of the positive numbers 2^k-222101121221201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (222101121220201) 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, 1337958561491 + ... + 1337958561656.

It is an arithmetic number, because the mean of its divisors is an integer number (56194259586108).

Almost surely, 2^{222101121221201} is an apocalyptic number.

It is an amenable number.

222101121221201 is a deficient number, since it is larger than the sum of its proper divisors (2675917123231).

222101121221201 is an equidigital number, since it uses as much as digits as its factorization.

222101121221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675917123230.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 222101121221201 its reverse (102122121101222), we get a palindrome (324223242322423).

The spelling of 222101121221201 in words is "two hundred twenty-two trillion, one hundred one billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred one".