212223711 has 32 divisors (see below), whose sum is σ = 352166400. Its totient is φ = 110920320.

The previous prime is 212223707. The next prime is 212223719. The reversal of 212223711 is 117322212.

It is not a de Polignac number, because 212223711 - 2² = 212223707 is a prime.

It is a super-2 number, since 2×212223711² = 90077807021223042, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212223719) 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, 2401 + ... + 20741.

It is an arithmetic number, because the mean of its divisors is an integer number (11005200).

Almost surely, 2^212223711 is an apocalyptic number.

212223711 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212223711 is a deficient number, since it is larger than the sum of its proper divisors (139942689).

212223711 is a wasteful number, since it uses less digits than its factorization.

212223711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18399.

The product of its digits is 336, while the sum is 21.

The square root of 212223711 is about 14567.9000202500. The cubic root of 212223711 is about 596.4828592647.

Adding to 212223711 its reverse (117322212), we get a palindrome (329545923).

The spelling of 212223711 in words is "two hundred twelve million, two hundred twenty-three thousand, seven hundred eleven".