1125121502154 has 128 divisors (see below), whose sum is σ = 2568337551360. Its totient is φ = 325730605824.

The previous prime is 1125121502101. The next prime is 1125121502161. The reversal of 1125121502154 is 4512051215211.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 340222569 + ... + 340225875.

It is an arithmetic number, because the mean of its divisors is an integer number (20065137120).

Almost surely, 2^{1125121502154} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1125121502154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1284168775680).

1125121502154 is an abundant number, since it is smaller than the sum of its proper divisors (1443216049206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1125121502154 is a wasteful number, since it uses less digits than its factorization.

1125121502154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4844.

The product of its (nonzero) digits is 4000, while the sum is 30.

Adding to 1125121502154 its reverse (4512051215211), we get a palindrome (5637172717365).

The spelling of 1125121502154 in words is "one trillion, one hundred twenty-five billion, one hundred twenty-one million, five hundred two thousand, one hundred fifty-four".