220212011021221 has 8 divisors (see below), whose sum is σ = 223829729616600. Its totient is φ = 216594540349440.

The previous prime is 220212011021203. The next prime is 220212011021309. The reversal of 220212011021221 is 122120110212022.

It can be written as a sum of positive squares in 4 ways, for example, as 15489970632900 + 204722040388321 = 3935730^2 + 14308111^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220212011021221 - 2¹⁷ = 220212010890149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220212011021021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60189436 + ... + 63743173.

It is an arithmetic number, because the mean of its divisors is an integer number (27978716202075).

Almost surely, 2^{220212011021221} is an apocalyptic number.

It is an amenable number.

220212011021221 is a deficient number, since it is larger than the sum of its proper divisors (3617718595379).

220212011021221 is a wasteful number, since it uses less digits than its factorization.

220212011021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123961799.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 220212011021221 its reverse (122120110212022), we get a palindrome (342332121233243).

The spelling of 220212011021221 in words is "two hundred twenty trillion, two hundred twelve billion, eleven million, twenty-one thousand, two hundred twenty-one".