222211220021121 has 16 divisors (see below), whose sum is σ = 297123917731200. Its totient is φ = 147719715036288.

The previous prime is 222211220021117. The next prime is 222211220021123. The reversal of 222211220021121 is 121120022112222.

It is not a de Polignac number, because 222211220021121 - 2² = 222211220021117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222211220021123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12965245 + ... + 24749141.

It is an arithmetic number, because the mean of its divisors is an integer number (18570244858200).

Almost surely, 2^{222211220021121} is an apocalyptic number.

It is an amenable number.

222211220021121 is a deficient number, since it is larger than the sum of its proper divisors (74912697710079).

222211220021121 is a wasteful number, since it uses less digits than its factorization.

222211220021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11801768.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 222211220021121 its reverse (121120022112222), we get a palindrome (343331242133343).

The spelling of 222211220021121 in words is "two hundred twenty-two trillion, two hundred eleven billion, two hundred twenty million, twenty-one thousand, one hundred twenty-one".