1155121049127 has 16 divisors (see below), whose sum is σ = 1542194295680. Its totient is φ = 769064868000.

The previous prime is 1155121049063. The next prime is 1155121049161. The reversal of 1155121049127 is 7219401215511.

It is not a de Polignac number, because 1155121049127 - 2⁶ = 1155121049063 is a prime.

It is a super-2 number, since 2×1155121049127² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155121049227) 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, 7579377 + ... + 7730277.

It is an arithmetic number, because the mean of its divisors is an integer number (96387143480).

Almost surely, 2^{1155121049127} is an apocalyptic number.

1155121049127 is a deficient number, since it is larger than the sum of its proper divisors (387073246553).

1155121049127 is a wasteful number, since it uses less digits than its factorization.

1155121049127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154254.

The product of its (nonzero) digits is 25200, while the sum is 39.

The spelling of 1155121049127 in words is "one trillion, one hundred fifty-five billion, one hundred twenty-one million, forty-nine thousand, one hundred twenty-seven".