212221023111 has 10 divisors (see below), whose sum is σ = 317021528472. Its totient is φ = 141480682020.

The previous prime is 212221023107. The next prime is 212221023139. The reversal of 212221023111 is 111320122212.

212221023111 is a `hidden beast` number, since 212 + 2 + 210 + 231 + 11 = 666.

It is not a de Polignac number, because 212221023111 - 2² = 212221023107 is a prime.

It is a super-2 number, since 2×212221023111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221027111) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1310006235 + ... + 1310006396.

Almost surely, 2^212221023111 is an apocalyptic number.

212221023111 is a deficient number, since it is larger than the sum of its proper divisors (104800505361).

212221023111 is an equidigital number, since it uses as much as digits as its factorization.

212221023111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2620012643 (or 2620012634 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 212221023111 its reverse (111320122212), we get a palindrome (323541145323).

The spelling of 212221023111 in words is "two hundred twelve billion, two hundred twenty-one million, twenty-three thousand, one hundred eleven".