22721229648612 has 216 divisors, whose sum is σ = 63378249261600. Its totient is φ = 6806447884800.

The previous prime is 22721229648581. The next prime is 22721229648701. The reversal of 22721229648612 is 21684692212722.

22721229648612 is a `hidden beast` number, since 2 + 2 + 7 + 2 + 12 + 2 + 9 + 6 + 4 + 8 + 612 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2354770764 + ... + 2354780412.

Almost surely, 2^{22721229648612} is an apocalyptic number.

22721229648612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22721229648612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31689124630800).

22721229648612 is an abundant number, since it is smaller than the sum of its proper divisors (40657019612988).

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

22721229648612 is a wasteful number, since it uses less digits than its factorization.

22721229648612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10215 (or 10019 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The spelling of 22721229648612 in words is "twenty-two trillion, seven hundred twenty-one billion, two hundred twenty-nine million, six hundred forty-eight thousand, six hundred twelve".