212100247431 has 24 divisors (see below), whose sum is σ = 325543087584. Its totient is φ = 132608878080.

The previous prime is 212100247427. The next prime is 212100247441. The reversal of 212100247431 is 134742001212.

212100247431 is a `hidden beast` number, since 212 + 10 + 0 + 2 + 4 + 7 + 431 = 666.

212100247431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212100247431 - 2² = 212100247427 is a prime.

It is a super-2 number, since 2×212100247431² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212100247395 and 212100247404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100247441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2423691 + ... + 2509676.

It is an arithmetic number, because the mean of its divisors is an integer number (13564295316).

Almost surely, 2^212100247431 is an apocalyptic number.

212100247431 is a deficient number, since it is larger than the sum of its proper divisors (113442840153).

212100247431 is a wasteful number, since it uses less digits than its factorization.

212100247431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4933671 (or 4933668 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

Adding to 212100247431 its reverse (134742001212), we get a palindrome (346842248643).

The spelling of 212100247431 in words is "two hundred twelve billion, one hundred million, two hundred forty-seven thousand, four hundred thirty-one".