212240330400 has 144 divisors (see below), whose sum is σ = 789534091584. Its totient is φ = 48512071680.

The previous prime is 212240330399. The next prime is 212240330429. The reversal of 212240330400 is 4033042212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6299877 + ... + 6333476.

It is an arithmetic number, because the mean of its divisors is an integer number (5482875636).

Almost surely, 2^212240330400 is an apocalyptic number.

212240330400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212240330400 is an abundant number, since it is smaller than the sum of its proper divisors (577293761184).

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

212240330400 is a wasteful number, since it uses less digits than its factorization.

212240330400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12633383 (or 12633370 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 212240330400 its reverse (4033042212), we get a palindrome (216273372612).

The spelling of 212240330400 in words is "two hundred twelve billion, two hundred forty million, three hundred thirty thousand, four hundred".