1252111031555 has 16 divisors (see below), whose sum is σ = 1510695089184. Its totient is φ = 996254138880.

The previous prime is 1252111031551. The next prime is 1252111031579. The reversal of 1252111031555 is 5551301112521.

It is not a de Polignac number, because 1252111031555 - 2² = 1252111031551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1252111031551) 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 15 ways as a sum of consecutive naturals, for example, 1124507 + ... + 1941323.

It is an arithmetic number, because the mean of its divisors is an integer number (94418443074).

Almost surely, 2^{1252111031555} is an apocalyptic number.

1252111031555 is a deficient number, since it is larger than the sum of its proper divisors (258584057629).

1252111031555 is a wasteful number, since it uses less digits than its factorization.

1252111031555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818486.

The product of its (nonzero) digits is 7500, while the sum is 32.

The spelling of 1252111031555 in words is "one trillion, two hundred fifty-two billion, one hundred eleven million, thirty-one thousand, five hundred fifty-five".