222011202110021 has 4 divisors (see below), whose sum is σ = 229666760803500. Its totient is φ = 214355643416544.

The previous prime is 222011202109993. The next prime is 222011202110041. The reversal of 222011202110021 is 120011202110222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 191366552260900 + 30644649849121 = 13833530^2 + 5535761^2 .

It is a cyclic number.

It is not a de Polignac number, because 222011202110021 - 2²⁶ = 222011135001157 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 (222011202110041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3827779346696 + ... + 3827779346753.

It is an arithmetic number, because the mean of its divisors is an integer number (57416690200875).

Almost surely, 2^{222011202110021} is an apocalyptic number.

It is an amenable number.

222011202110021 is a deficient number, since it is larger than the sum of its proper divisors (7655558693479).

222011202110021 is an equidigital number, since it uses as much as digits as its factorization.

222011202110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7655558693478.

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

Adding to 222011202110021 its reverse (120011202110222), we get a palindrome (342022404220243).

The spelling of 222011202110021 in words is "two hundred twenty-two trillion, eleven billion, two hundred two million, one hundred ten thousand, twenty-one".