1220155530025 has 6 divisors (see below), whose sum is σ = 1512992857262. Its totient is φ = 976124424000.

The previous prime is 1220155530023. The next prime is 1220155530031. The reversal of 1220155530025 is 5200355510221.

It can be written as a sum of positive squares in 3 ways, for example, as 324240275241 + 895915254784 = 569421^2 + 946528^2 .

It is not a de Polignac number, because 1220155530025 - 2¹ = 1220155530023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220155530023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24403110576 + ... + 24403110625.

Almost surely, 2^{1220155530025} is an apocalyptic number.

It is an amenable number.

1220155530025 is a deficient number, since it is larger than the sum of its proper divisors (292837327237).

1220155530025 is an equidigital number, since it uses as much as digits as its factorization.

1220155530025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48806221211 (or 48806221206 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 1220155530025 in words is "one trillion, two hundred twenty billion, one hundred fifty-five million, five hundred thirty thousand, twenty-five".