21234177712 has 40 divisors (see below), whose sum is σ = 45252295632. Its totient is φ = 9651889280.

The previous prime is 21234177707. The next prime is 21234177721. The reversal of 21234177712 is 21777143212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477253 + ... + 519844.

Almost surely, 2^21234177712 is an apocalyptic number.

21234177712 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21234177712 is an abundant number, since it is smaller than the sum of its proper divisors (24018117920).

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

21234177712 is an equidigital number, since it uses as much as digits as its factorization.

21234177712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997138 (or 997110 counting only the distinct ones).

The product of its digits is 32928, while the sum is 37.

The spelling of 21234177712 in words is "twenty-one billion, two hundred thirty-four million, one hundred seventy-seven thousand, seven hundred twelve".