222122001220021 has 16 divisors (see below), whose sum is σ = 267215305397760. Its totient is φ = 180369159559920.

The previous prime is 222122001219991. The next prime is 222122001220061. The reversal of 222122001220021 is 120022100221222.

222122001220021 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 222122001220021 - 2¹⁹ = 222122000695733 is a prime.

It is a super-2 number, since 2×222122001220021² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222122001220061) 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, 41036886 + ... + 46133176.

It is an arithmetic number, because the mean of its divisors is an integer number (16700956587360).

Almost surely, 2^{222122001220021} is an apocalyptic number.

It is an amenable number.

222122001220021 is a deficient number, since it is larger than the sum of its proper divisors (45093304177739).

222122001220021 is a wasteful number, since it uses less digits than its factorization.

222122001220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5424024.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 222122001220021 its reverse (120022100221222), we get a palindrome (342144101441243).

The spelling of 222122001220021 in words is "two hundred twenty-two trillion, one hundred twenty-two billion, one million, two hundred twenty thousand, twenty-one".