220100120011221 has 32 divisors (see below), whose sum is σ = 311150496908160. Its totient is φ = 137915062585344.

The previous prime is 220100120011217. The next prime is 220100120011267. The reversal of 220100120011221 is 122110021001022.

It is not a de Polignac number, because 220100120011221 - 2² = 220100120011217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220100120011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220100120015221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140207766 + ... + 141768888.

It is an arithmetic number, because the mean of its divisors is an integer number (9723453028380).

Almost surely, 2^{220100120011221} is an apocalyptic number.

It is an amenable number.

220100120011221 is a deficient number, since it is larger than the sum of its proper divisors (91050376896939).

220100120011221 is a wasteful number, since it uses less digits than its factorization.

220100120011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564885.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 220100120011221 its reverse (122110021001022), we get a palindrome (342210141012243).

The spelling of 220100120011221 in words is "two hundred twenty trillion, one hundred billion, one hundred twenty million, eleven thousand, two hundred twenty-one".