1012111125 has 32 divisors (see below), whose sum is σ = 1696356480. Its totient is φ = 535881600.

The previous prime is 1012111123. The next prime is 1012111129. The reversal of 1012111125 is 5211112101.

It is not a de Polignac number, because 1012111125 - 2¹ = 1012111123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012111123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42417 + ... + 61833.

It is an arithmetic number, because the mean of its divisors is an integer number (53011140).

Almost surely, 2^1012111125 is an apocalyptic number.

1012111125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1012111125 is a deficient number, since it is larger than the sum of its proper divisors (684245355).

1012111125 is a wasteful number, since it uses less digits than its factorization.

1012111125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19574 (or 19564 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 15.

The square root of 1012111125 is about 31813.6939854522. The cubic root of 1012111125 is about 1004.0208527412.

Adding to 1012111125 its reverse (5211112101), we get a palindrome (6223223226).

The spelling of 1012111125 in words is "one billion, twelve million, one hundred eleven thousand, one hundred twenty-five".