212220011111 has 16 divisors (see below), whose sum is σ = 228614284800. Its totient is φ = 196400181600.

The previous prime is 212220011057. The next prime is 212220011131. The reversal of 212220011111 is 111110022212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212220011111 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 (212220011131) 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, 574595 + ... + 868676.

It is an arithmetic number, because the mean of its divisors is an integer number (14288392800).

Almost surely, 2^212220011111 is an apocalyptic number.

212220011111 is a deficient number, since it is larger than the sum of its proper divisors (16394273689).

212220011111 is a wasteful number, since it uses less digits than its factorization.

212220011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443470.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212220011111 its reverse (111110022212), we get a palindrome (323330033323).

The spelling of 212220011111 in words is "two hundred twelve billion, two hundred twenty million, eleven thousand, one hundred eleven".