212100434 has 48 divisors (see below), whose sum is σ = 409520832. Its totient is φ = 80223264.

The previous prime is 212100433. The next prime is 212100437. The reversal of 212100434 is 434001212.

It is not an unprimeable number, because it can be changed into a prime (212100433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95177 + ... + 97379.

It is an arithmetic number, because the mean of its divisors is an integer number (8531684).

Almost surely, 2^212100434 is an apocalyptic number.

212100434 is a deficient number, since it is larger than the sum of its proper divisors (197420398).

212100434 is a wasteful number, since it uses less digits than its factorization.

212100434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271 (or 2248 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 212100434 is about 14563.6682879005. The cubic root of 212100434 is about 596.3673414469.

Adding to 212100434 its reverse (434001212), we get a palindrome (646101646).

The spelling of 212100434 in words is "two hundred twelve million, one hundred thousand, four hundred thirty-four".