1222152273855 has 24 divisors (see below), whose sum is σ = 2210501505888. Its totient is φ = 623474782656.

The previous prime is 1222152273851. The next prime is 1222152273889. The reversal of 1222152273855 is 5583722512221.

It is a happy number.

1222152273855 is a `hidden beast` number, since 1 + 2 + 2 + 2 + 1 + 522 + 73 + 8 + 55 = 666.

It is not a de Polignac number, because 1222152273855 - 2² = 1222152273851 is a prime.

It is a super-2 number, since 2×1222152273855² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1222152273855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222152273851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 590410692 + ... + 590412761.

It is an arithmetic number, because the mean of its divisors is an integer number (92104229412).

Almost surely, 2^{1222152273855} is an apocalyptic number.

1222152273855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1222152273855 is a deficient number, since it is larger than the sum of its proper divisors (988349232033).

1222152273855 is a wasteful number, since it uses less digits than its factorization.

1222152273855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180823487 (or 1180823484 counting only the distinct ones).

The product of its digits is 672000, while the sum is 45.

The spelling of 1222152273855 in words is "one trillion, two hundred twenty-two billion, one hundred fifty-two million, two hundred seventy-three thousand, eight hundred fifty-five".