212321122111 has 8 divisors (see below), whose sum is σ = 242683926560. Its totient is φ = 181966121568.

The previous prime is 212321122103. The next prime is 212321122199. The reversal of 212321122111 is 111221123212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212321122111 - 2³ = 212321122103 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 (212321122411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1892556 + ... + 2001601.

It is an arithmetic number, because the mean of its divisors is an integer number (30335490820).

Almost surely, 2^212321122111 is an apocalyptic number.

212321122111 is a deficient number, since it is larger than the sum of its proper divisors (30362804449).

212321122111 is an equidigital number, since it uses as much as digits as its factorization.

212321122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3901953.

The product of its digits is 96, while the sum is 19.

Adding to 212321122111 its reverse (111221123212), we get a palindrome (323542245323).

The spelling of 212321122111 in words is "two hundred twelve billion, three hundred twenty-one million, one hundred twenty-two thousand, one hundred eleven".