211432241021 has 8 divisors (see below), whose sum is σ = 212917815000. Its totient is φ = 209947554880.

The previous prime is 211432241017. The next prime is 211432241039. The reversal of 211432241021 is 120142234112.

It can be written as a sum of positive squares in 4 ways, for example, as 264420121 + 211167820900 = 16261^2 + 459530^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 211432241021 - 2² = 211432241017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211432241011) 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, 259655 + ... + 700203.

It is an arithmetic number, because the mean of its divisors is an integer number (26614726875).

Almost surely, 2^211432241021 is an apocalyptic number.

It is an amenable number.

211432241021 is a deficient number, since it is larger than the sum of its proper divisors (1485573979).

211432241021 is a wasteful number, since it uses less digits than its factorization.

211432241021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443919.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 211432241021 its reverse (120142234112), we get a palindrome (331574475133).

The spelling of 211432241021 in words is "two hundred eleven billion, four hundred thirty-two million, two hundred forty-one thousand, twenty-one".