211432223021 has 4 divisors (see below), whose sum is σ = 218252617344. Its totient is φ = 204611828700.

The previous prime is 211432223011. The next prime is 211432223053. The reversal of 211432223021 is 120322234112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211432223021 - 2¹⁴ = 211432206637 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 (211432223011) 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, 3410197115 + ... + 3410197176.

It is an arithmetic number, because the mean of its divisors is an integer number (54563154336).

Almost surely, 2^211432223021 is an apocalyptic number.

It is an amenable number.

211432223021 is a deficient number, since it is larger than the sum of its proper divisors (6820394323).

211432223021 is an equidigital number, since it uses as much as digits as its factorization.

211432223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6820394322.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 211432223021 its reverse (120322234112), we get a palindrome (331754457133).

The spelling of 211432223021 in words is "two hundred eleven billion, four hundred thirty-two million, two hundred twenty-three thousand, twenty-one".