212233100431 has 4 divisors (see below), whose sum is σ = 231527018664. Its totient is φ = 192939182200.

The previous prime is 212233100423. The next prime is 212233100449. The reversal of 212233100431 is 134001332212.

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 212233100431 - 2³ = 212233100423 is a prime.

It is a super-2 number, since 2×212233100431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212233100411) 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 3 ways as a sum of consecutive naturals, for example, 9646959100 + ... + 9646959121.

It is an arithmetic number, because the mean of its divisors is an integer number (57881754666).

Almost surely, 2^212233100431 is an apocalyptic number.

212233100431 is a deficient number, since it is larger than the sum of its proper divisors (19293918233).

212233100431 is a wasteful number, since it uses less digits than its factorization.

212233100431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19293918232.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 212233100431 its reverse (134001332212), we get a palindrome (346234432643).

The spelling of 212233100431 in words is "two hundred twelve billion, two hundred thirty-three million, one hundred thousand, four hundred thirty-one".