221220220212021 has 8 divisors (see below), whose sum is σ = 294961614815520. Its totient is φ = 147479486208272.

The previous prime is 221220220212007. The next prime is 221220220212059. The reversal of 221220220212021 is 120212022022122.

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 221220220212021 - 2¹¹ = 221220220209973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220220212071) 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, 164368026 + ... + 165708443.

It is an arithmetic number, because the mean of its divisors is an integer number (36870201851940).

Almost surely, 2^{221220220212021} is an apocalyptic number.

It is an amenable number.

221220220212021 is a deficient number, since it is larger than the sum of its proper divisors (73741394603499).

221220220212021 is a wasteful number, since it uses less digits than its factorization.

221220220212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330299875.

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

Adding to 221220220212021 its reverse (120212022022122), we get a palindrome (341432242234143).

The spelling of 221220220212021 in words is "two hundred twenty-one trillion, two hundred twenty billion, two hundred twenty million, two hundred twelve thousand, twenty-one".