211244421433 has 16 divisors (see below), whose sum is σ = 213999022336. Its totient is φ = 208510848000.

The previous prime is 211244421383. The next prime is 211244421461. The reversal of 211244421433 is 334124442112.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211244421433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211244421395 and 211244421404.

It is not an unprimeable number, because it can be changed into a prime (211244421533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22751410 + ... + 22760692.

It is an arithmetic number, because the mean of its divisors is an integer number (13374938896).

Almost surely, 2^211244421433 is an apocalyptic number.

It is an amenable number.

211244421433 is a deficient number, since it is larger than the sum of its proper divisors (2754600903).

211244421433 is a wasteful number, since it uses less digits than its factorization.

211244421433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10384.

The product of its digits is 18432, while the sum is 31.

Adding to 211244421433 its reverse (334124442112), we get a palindrome (545368863545).

The spelling of 211244421433 in words is "two hundred eleven billion, two hundred forty-four million, four hundred twenty-one thousand, four hundred thirty-three".