1121012520 has 32 divisors (see below), whose sum is σ = 3363037920. Its totient is φ = 298936640.

The previous prime is 1121012513. The next prime is 1121012527. The reversal of 1121012520 is 252101211.

It is an interprime number because it is at equal distance from previous prime (1121012513) and next prime (1121012527).

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

It is a self number, because there is not a number n which added to its sum of digits gives 1121012520.

It is not an unprimeable number, because it can be changed into a prime (1121012527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4670766 + ... + 4671005.

It is an arithmetic number, because the mean of its divisors is an integer number (105094935).

Almost surely, 2^1121012520 is an apocalyptic number.

1121012520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121012520 is an abundant number, since it is smaller than the sum of its proper divisors (2242025400).

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

1121012520 is a wasteful number, since it uses less digits than its factorization.

1121012520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9341785 (or 9341781 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 1121012520 is about 33481.5250548717. The cubic root of 1121012520 is about 1038.8116727869.

Adding to 1121012520 its reverse (252101211), we get a palindrome (1373113731).

The spelling of 1121012520 in words is "one billion, one hundred twenty-one million, twelve thousand, five hundred twenty".