222201220111021 has 4 divisors (see below), whose sum is σ = 225330814760544. Its totient is φ = 219071625461500.

The previous prime is 222201220110973. The next prime is 222201220111069. The reversal of 222201220111021 is 120111022102222.

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 an interprime number because it is at equal distance from previous prime (222201220110973) and next prime (222201220111069).

It is a cyclic number.

It is not a de Polignac number, because 222201220111021 - 2²¹ = 222201218013869 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 222201220111021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222201220114021) 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, 1564797324655 + ... + 1564797324796.

It is an arithmetic number, because the mean of its divisors is an integer number (56332703690136).

Almost surely, 2^{222201220111021} is an apocalyptic number.

It is an amenable number.

222201220111021 is a deficient number, since it is larger than the sum of its proper divisors (3129594649523).

222201220111021 is an equidigital number, since it uses as much as digits as its factorization.

222201220111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3129594649522.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 222201220111021 its reverse (120111022102222), we get a palindrome (342312242213243).

The spelling of 222201220111021 in words is "two hundred twenty-two trillion, two hundred one billion, two hundred twenty million, one hundred eleven thousand, twenty-one".