221210222111011 has 32 divisors (see below), whose sum is σ = 267554522843136. Its totient is φ = 178786748448000.

The previous prime is 221210222110979. The next prime is 221210222111071. The reversal of 221210222111011 is 110111222012122.

It is a happy number.

It is not a de Polignac number, because 221210222111011 - 2⁵ = 221210222110979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221210222111011.

It is not an unprimeable number, because it can be changed into a prime (221210222111071) 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, 85150081 + ... + 87709501.

It is an arithmetic number, because the mean of its divisors is an integer number (8361078838848).

Almost surely, 2^{221210222111011} is an apocalyptic number.

221210222111011 is a deficient number, since it is larger than the sum of its proper divisors (46344300732125).

221210222111011 is a wasteful number, since it uses less digits than its factorization.

221210222111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2567083.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221210222111011 its reverse (110111222012122), we get a palindrome (331321444123133).

The spelling of 221210222111011 in words is "two hundred twenty-one trillion, two hundred ten billion, two hundred twenty-two million, one hundred eleven thousand, eleven".