222220212122021 has 4 divisors (see below), whose sum is σ = 222220643461632. Its totient is φ = 222219780782412.

The previous prime is 222220212121997. The next prime is 222220212122053. The reversal of 222220212122021 is 120221212022222.

222220212122021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 222220212122021 - 2³⁴ = 222203032252837 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 (222220212122521) 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, 214896101 + ... + 215927706.

It is an arithmetic number, because the mean of its divisors is an integer number (55555160865408).

Almost surely, 2^{222220212122021} is an apocalyptic number.

It is an amenable number.

222220212122021 is a deficient number, since it is larger than the sum of its proper divisors (431339611).

222220212122021 is an equidigital number, since it uses as much as digits as its factorization.

222220212122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431339610.

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

Adding to 222220212122021 its reverse (120221212022222), we get a palindrome (342441424144243).

The spelling of 222220212122021 in words is "two hundred twenty-two trillion, two hundred twenty billion, two hundred twelve million, one hundred twenty-two thousand, twenty-one".