221022022222121 has 16 divisors (see below), whose sum is σ = 225876603189888. Its totient is φ = 216228747408000.

The previous prime is 221022022222039. The next prime is 221022022222201. The reversal of 221022022222121 is 121222220220122.

It is a cyclic number.

It is not a de Polignac number, because 221022022222121 - 2¹⁴ = 221022022205737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221022022252121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23842820 + ... + 31788741.

It is an arithmetic number, because the mean of its divisors is an integer number (14117287699368).

Almost surely, 2^{221022022222121} is an apocalyptic number.

It is an amenable number.

221022022222121 is a deficient number, since it is larger than the sum of its proper divisors (4854580967767).

221022022222121 is a wasteful number, since it uses less digits than its factorization.

221022022222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55632112.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 221022022222121 its reverse (121222220220122), we get a palindrome (342244242442243).

The spelling of 221022022222121 in words is "two hundred twenty-one trillion, twenty-two billion, twenty-two million, two hundred twenty-two thousand, one hundred twenty-one".