1222020172800 has 2376 divisors, whose sum is σ = 5582408744640. Its totient is φ = 263363788800.

The previous prime is 1222020172799. The next prime is 1222020172801. The reversal of 1222020172800 is 82710202221.

It is an interprime number because it is at equal distance from previous prime (1222020172799) and next prime (1222020172801).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1222020172801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 5791564695 + ... + 5791564905.

Almost surely, 2^{1222020172800} is an apocalyptic number.

1222020172800 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 1222020172800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2791204372320).

1222020172800 is an abundant number, since it is smaller than the sum of its proper divisors (4360388571840).

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

1222020172800 is a wasteful number, since it uses less digits than its factorization.

1222020172800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The spelling of 1222020172800 in words is "one trillion, two hundred twenty-two billion, twenty million, one hundred seventy-two thousand, eight hundred".