1213555200025 has 48 divisors (see below), whose sum is σ = 1759214153088. Its totient is φ = 813196800000.

The previous prime is 1213555199999. The next prime is 1213555200029. The reversal of 1213555200025 is 5200025553121.

It is not a de Polignac number, because 1213555200025 - 2⁷ = 1213555199897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213555200025.

It is not an unprimeable number, because it can be changed into a prime (1213555200029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2067385 + ... + 2588665.

It is an arithmetic number, because the mean of its divisors is an integer number (36650294856).

Almost surely, 2^{1213555200025} is an apocalyptic number.

It is an amenable number.

1213555200025 is a deficient number, since it is larger than the sum of its proper divisors (545658953063).

1213555200025 is a wasteful number, since it uses less digits than its factorization.

1213555200025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521602 (or 521597 counting only the distinct ones).

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

The spelling of 1213555200025 in words is "one trillion, two hundred thirteen billion, five hundred fifty-five million, two hundred thousand, twenty-five".