212121343104 has 128 divisors (see below), whose sum is σ = 647021088000. Its totient is φ = 60896056320.

The previous prime is 212121343097. The next prime is 212121343127. The reversal of 212121343104 is 401343121212.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1241274 + ... + 1401785.

It is an arithmetic number, because the mean of its divisors is an integer number (5054852250).

Almost surely, 2^212121343104 is an apocalyptic number.

212121343104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

212121343104 is an abundant number, since it is smaller than the sum of its proper divisors (434899744896).

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

212121343104 is a wasteful number, since it uses less digits than its factorization.

212121343104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2643106 (or 2643094 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 212121343104 its reverse (401343121212), we get a palindrome (613464464316).

The spelling of 212121343104 in words is "two hundred twelve billion, one hundred twenty-one million, three hundred forty-three thousand, one hundred four".