721194861212 has 12 divisors (see below), whose sum is σ = 1442389722480. Its totient is φ = 309083511936.

The previous prime is 721194861173. The next prime is 721194861223. The reversal of 721194861212 is 212168491127.

It is a happy number.

721194861212 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12878479637 + ... + 12878479692.

It is an arithmetic number, because the mean of its divisors is an integer number (120199143540).

Almost surely, 2^721194861212 is an apocalyptic number.

It is an amenable number.

721194861212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

721194861212 is a wasteful number, since it uses less digits than its factorization.

721194861212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25756959340 (or 25756959338 counting only the distinct ones).

The product of its digits is 96768, while the sum is 44.

The spelling of 721194861212 in words is "seven hundred twenty-one billion, one hundred ninety-four million, eight hundred sixty-one thousand, two hundred twelve".