212321212432 has 30 divisors (see below), whose sum is σ = 478535183358. Its totient is φ = 90994804992.

The previous prime is 212321212429. The next prime is 212321212447. The reversal of 212321212432 is 234212123212.

It can be written as a sum of positive squares in only one way, i.e., 209529569536 + 2791642896 = 457744^2 + 52836^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212321212397 and 212321212406.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 135408153 + ... + 135409720.

Almost surely, 2^212321212432 is an apocalyptic number.

It is an amenable number.

212321212432 is an abundant number, since it is smaller than the sum of its proper divisors (266213970926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212321212432 is a wasteful number, since it uses less digits than its factorization.

212321212432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270817895 (or 270817882 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

Adding to 212321212432 its reverse (234212123212), we get a palindrome (446533335644).

The spelling of 212321212432 in words is "two hundred twelve billion, three hundred twenty-one million, two hundred twelve thousand, four hundred thirty-two".