721212201222112 has 96 divisors (see below), whose sum is σ = 1448848854835200. Its totient is φ = 353314217571840.

The previous prime is 721212201222103. The next prime is 721212201222119. The reversal of 721212201222112 is 211222102212127.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721212201222119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4419137889 + ... + 4419301087.

It is an arithmetic number, because the mean of its divisors is an integer number (15092175571200).

Almost surely, 2^{721212201222112} is an apocalyptic number.

It is an amenable number.

721212201222112 is an abundant number, since it is smaller than the sum of its proper divisors (727636653613088).

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

721212201222112 is a wasteful number, since it uses less digits than its factorization.

721212201222112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175376 (or 175368 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

Adding to 721212201222112 its reverse (211222102212127), we get a palindrome (932434303434239).

The spelling of 721212201222112 in words is "seven hundred twenty-one trillion, two hundred twelve billion, two hundred one million, two hundred twenty-two thousand, one hundred twelve".