212132221111 has 4 divisors (see below), whose sum is σ = 216645672672. Its totient is φ = 207618769552.

The previous prime is 212132221097. The next prime is 212132221157. The reversal of 212132221111 is 111122231212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212132221111 - 2¹¹ = 212132219063 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 (212132221181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2256725710 + ... + 2256725803.

It is an arithmetic number, because the mean of its divisors is an integer number (54161418168).

Almost surely, 2^212132221111 is an apocalyptic number.

212132221111 is a deficient number, since it is larger than the sum of its proper divisors (4513451561).

212132221111 is an equidigital number, since it uses as much as digits as its factorization.

212132221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4513451560.

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

Adding to 212132221111 its reverse (111122231212), we get a palindrome (323254452323).

The spelling of 212132221111 in words is "two hundred twelve billion, one hundred thirty-two million, two hundred twenty-one thousand, one hundred eleven".