212021232311 has 4 divisors (see below), whose sum is σ = 242309979792. Its totient is φ = 181732484832.

The previous prime is 212021232299. The next prime is 212021232317. The reversal of 212021232311 is 113232120212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021232311 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 (212021232317) 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, 15144373730 + ... + 15144373743.

It is an arithmetic number, because the mean of its divisors is an integer number (60577494948).

Almost surely, 2^212021232311 is an apocalyptic number.

212021232311 is a deficient number, since it is larger than the sum of its proper divisors (30288747481).

212021232311 is an equidigital number, since it uses as much as digits as its factorization.

212021232311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30288747480.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212021232311 its reverse (113232120212), we get a palindrome (325253352523).

The spelling of 212021232311 in words is "two hundred twelve billion, twenty-one million, two hundred thirty-two thousand, three hundred eleven".