222121221121101 has 4 divisors (see below), whose sum is σ = 296161628161472. Its totient is φ = 148080814080732.

The previous prime is 222121221121001. The next prime is 222121221121103. The reversal of 222121221121101 is 101121122121222.

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 not a de Polignac number, because 222121221121101 - 2¹⁰ = 222121221120077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121221121103) 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, 37020203520181 + ... + 37020203520186.

It is an arithmetic number, because the mean of its divisors is an integer number (74040407040368).

Almost surely, 2^{222121221121101} is an apocalyptic number.

It is an amenable number.

222121221121101 is a deficient number, since it is larger than the sum of its proper divisors (74040407040371).

222121221121101 is an equidigital number, since it uses as much as digits as its factorization.

222121221121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74040407040370.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 222121221121101 its reverse (101121122121222), we get a palindrome (323242343242323).

The spelling of 222121221121101 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred one".