220001210112221 has 4 divisors (see below), whose sum is σ = 220025157134592. Its totient is φ = 219977263089852.

The previous prime is 220001210112163. The next prime is 220001210112239. The reversal of 220001210112221 is 122211012100022.

220001210112221 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 220001210112221 - 2¹⁴ = 220001210095837 is a prime.

It is a super-2 number, since 2×220001210112221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220001210112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220001210112251) 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, 11973497405 + ... + 11973515778.

It is an arithmetic number, because the mean of its divisors is an integer number (55006289283648).

Almost surely, 2^{220001210112221} is an apocalyptic number.

It is an amenable number.

220001210112221 is a deficient number, since it is larger than the sum of its proper divisors (23947022371).

220001210112221 is an equidigital number, since it uses as much as digits as its factorization.

220001210112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23947022370.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 220001210112221 its reverse (122211012100022), we get a palindrome (342212222212243).

The spelling of 220001210112221 in words is "two hundred twenty trillion, one billion, two hundred ten million, one hundred twelve thousand, two hundred twenty-one".