212322312111 has 64 divisors (see below), whose sum is σ = 354235392000. Its totient is φ = 110132770176.

The previous prime is 212322312067. The next prime is 212322312121. The reversal of 212322312111 is 111213223212.

It is not a de Polignac number, because 212322312111 - 2¹⁵ = 212322279343 is a prime.

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 (212322312121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10946620 + ... + 10965998.

It is an arithmetic number, because the mean of its divisors is an integer number (5534928000).

Almost surely, 2^212322312111 is an apocalyptic number.

212322312111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212322312111 is a deficient number, since it is larger than the sum of its proper divisors (141913079889).

212322312111 is a wasteful number, since it uses less digits than its factorization.

212322312111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20068.

The product of its digits is 288, while the sum is 21.

Adding to 212322312111 its reverse (111213223212), we get a palindrome (323535535323).

The spelling of 212322312111 in words is "two hundred twelve billion, three hundred twenty-two million, three hundred twelve thousand, one hundred eleven".