220121202022221 has 128 divisors (see below), whose sum is σ = 306573189120000. Its totient is φ = 140396714954496.

The previous prime is 220121202022217. The next prime is 220121202022291. The reversal of 220121202022221 is 122220202121022.

It is not a de Polignac number, because 220121202022221 - 2² = 220121202022217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220121202022291) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 334023067990 + ... + 334023068648.

It is an arithmetic number, because the mean of its divisors is an integer number (2395103040000).

Almost surely, 2^{220121202022221} is an apocalyptic number.

It is an amenable number.

220121202022221 is a deficient number, since it is larger than the sum of its proper divisors (86451987097779).

220121202022221 is a wasteful number, since it uses less digits than its factorization.

220121202022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 220121202022221 its reverse (122220202121022), we get a palindrome (342341404143243).

The spelling of 220121202022221 in words is "two hundred twenty trillion, one hundred twenty-one billion, two hundred two million, twenty-two thousand, two hundred twenty-one".