1222045362720 has 1152 divisors, whose sum is σ = 5377467916800. Its totient is φ = 256912072704.

The previous prime is 1222045362719. The next prime is 1222045362731. The reversal of 1222045362720 is 272635402221.

1222045362720 is a `hidden beast` number, since 1 + 2 + 2 + 2 + 0 + 4 + 5 + 3 + 627 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 987909942 + ... + 987911178.

It is an arithmetic number, because the mean of its divisors is an integer number (4667940900).

Almost surely, 2^{1222045362720} is an apocalyptic number.

1222045362720 is a gapful number since it is divisible by the number (10) 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 1222045362720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2688733958400).

1222045362720 is an abundant number, since it is smaller than the sum of its proper divisors (4155422554080).

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

1222045362720 is a wasteful number, since it uses less digits than its factorization.

1222045362720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647 (or 1626 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The spelling of 1222045362720 in words is "one trillion, two hundred twenty-two billion, forty-five million, three hundred sixty-two thousand, seven hundred twenty".