221120021211 has 16 divisors (see below), whose sum is σ = 297579115680. Its totient is φ = 146038394880.

The previous prime is 221120021191. The next prime is 221120021219. The reversal of 221120021211 is 112120021122.

It is not a de Polignac number, because 221120021211 - 2²⁷ = 220985803483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221120021219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 552051 + ... + 864291.

It is an arithmetic number, because the mean of its divisors is an integer number (18598694730).

Almost surely, 2^221120021211 is an apocalyptic number.

221120021211 is a deficient number, since it is larger than the sum of its proper divisors (76459094469).

221120021211 is a wasteful number, since it uses less digits than its factorization.

221120021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314446.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221120021211 its reverse (112120021122), we get a palindrome (333240042333).

The spelling of 221120021211 in words is "two hundred twenty-one billion, one hundred twenty million, twenty-one thousand, two hundred eleven".