1251101541115 has 16 divisors (see below), whose sum is σ = 1531018464768. Its totient is φ = 981117311616.

The previous prime is 1251101541113. The next prime is 1251101541149. The reversal of 1251101541115 is 5111451011521.

It is a cyclic number.

It is not a de Polignac number, because 1251101541115 - 2¹ = 1251101541113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251101541113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1817307 + ... + 2409316.

It is an arithmetic number, because the mean of its divisors is an integer number (95688654048).

Almost surely, 2^{1251101541115} is an apocalyptic number.

1251101541115 is a deficient number, since it is larger than the sum of its proper divisors (279916923653).

1251101541115 is a wasteful number, since it uses less digits than its factorization.

1251101541115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4227798.

The product of its (nonzero) digits is 1000, while the sum is 28.

Adding to 1251101541115 its reverse (5111451011521), we get a palindrome (6362552552636).

It can be divided in two parts, 125110 and 1541115, that added together give a triangular number (1666225 = T₁₈₂₅).

The spelling of 1251101541115 in words is "one trillion, two hundred fifty-one billion, one hundred one million, five hundred forty-one thousand, one hundred fifteen".