212112154500 has 96 divisors (see below), whose sum is σ = 617790875520. Its totient is φ = 56552227200.

The previous prime is 212112154483. The next prime is 212112154511. The reversal of 212112154500 is 5451211212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10233147 + ... + 10253853.

It is an arithmetic number, because the mean of its divisors is an integer number (6435321620).

Almost surely, 2^212112154500 is an apocalyptic number.

212112154500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212112154500 is an abundant number, since it is smaller than the sum of its proper divisors (405678721020).

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

212112154500 is a wasteful number, since it uses less digits than its factorization.

212112154500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27558 (or 27546 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 212112154500 its reverse (5451211212), we get a palindrome (217563365712).

The spelling of 212112154500 in words is "two hundred twelve billion, one hundred twelve million, one hundred fifty-four thousand, five hundred".