220222212121021 has 16 divisors (see below), whose sum is σ = 241494812838720. Its totient is φ = 199158410142720.

The previous prime is 220222212120983. The next prime is 220222212121049. The reversal of 220222212121021 is 120121212222022.

It is a cyclic number.

It is not a de Polignac number, because 220222212121021 - 2⁷ = 220222212120893 is a prime.

It is a super-2 number, since 2×220222212121021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220222212120983 and 220222212121001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220222222121021) 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, 66321715 + ... + 69563023.

It is an arithmetic number, because the mean of its divisors is an integer number (15093425802420).

Almost surely, 2^{220222212121021} is an apocalyptic number.

It is an amenable number.

220222212121021 is a deficient number, since it is larger than the sum of its proper divisors (21272600717699).

220222212121021 is a wasteful number, since it uses less digits than its factorization.

220222212121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3273516.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 220222212121021 its reverse (120121212222022), we get a palindrome (340343424343043).

The spelling of 220222212121021 in words is "two hundred twenty trillion, two hundred twenty-two billion, two hundred twelve million, one hundred twenty-one thousand, twenty-one".