220021110012221 has 32 divisors (see below), whose sum is σ = 266808281322240. Its totient is φ = 177119915212800.

The previous prime is 220021110012217. The next prime is 220021110012247. The reversal of 220021110012221 is 122210011120022.

220021110012221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220021110012221 - 2² = 220021110012217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 220021110012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021110032221) 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, 738452045 + ... + 738749933.

It is an arithmetic number, because the mean of its divisors is an integer number (8337758791320).

Almost surely, 2^{220021110012221} is an apocalyptic number.

It is an amenable number.

220021110012221 is a deficient number, since it is larger than the sum of its proper divisors (46787171310019).

220021110012221 is a wasteful number, since it uses less digits than its factorization.

220021110012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311045.

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

Adding to 220021110012221 its reverse (122210011120022), we get a palindrome (342231121132243).

The spelling of 220021110012221 in words is "two hundred twenty trillion, twenty-one billion, one hundred ten million, twelve thousand, two hundred twenty-one".