16221322126452 has 48 divisors (see below), whose sum is σ = 39155463857664. Its totient is φ = 5221333776000.

The previous prime is 16221322126447. The next prime is 16221322126469. The reversal of 16221322126452 is 25462122312261.

It is a self number, because there is not a number n which added to its sum of digits gives 16221322126452.

It is a congruent number.

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, 47123199 + ... + 47466182.

It is an arithmetic number, because the mean of its divisors is an integer number (815738830368).

Almost surely, 2^{16221322126452} is an apocalyptic number.

16221322126452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16221322126452 is an abundant number, since it is smaller than the sum of its proper divisors (22934141731212).

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

16221322126452 is a wasteful number, since it uses less digits than its factorization.

16221322126452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94589880 (or 94589878 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The spelling of 16221322126452 in words is "sixteen trillion, two hundred twenty-one billion, three hundred twenty-two million, one hundred twenty-six thousand, four hundred fifty-two".