222220121222021 has 16 divisors (see below), whose sum is σ = 239526896406336. Its totient is φ = 204943773691776.

The previous prime is 222220121221949. The next prime is 222220121222083. The reversal of 222220121222021 is 120222121022222.

222220121222021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 222220121222021 - 2²⁶ = 222220054113157 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 (222220121222221) 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, 552595001 + ... + 552996993.

It is an arithmetic number, because the mean of its divisors is an integer number (14970431025396).

Almost surely, 2^{222220121222021} is an apocalyptic number.

It is an amenable number.

222220121222021 is a deficient number, since it is larger than the sum of its proper divisors (17306775184315).

222220121222021 is a wasteful number, since it uses less digits than its factorization.

222220121222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439732.

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

Adding to 222220121222021 its reverse (120222121022222), we get a palindrome (342442242244243).

The spelling of 222220121222021 in words is "two hundred twenty-two trillion, two hundred twenty billion, one hundred twenty-one million, two hundred twenty-two thousand, twenty-one".