1121725118 has 4 divisors (see below), whose sum is σ = 1682587680. Its totient is φ = 560862558.

The previous prime is 1121725103. The next prime is 1121725147. The reversal of 1121725118 is 8115271211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8115271211 = 211 ⋅38461001.

It is a super-2 number, since 2×1121725118² = 2516534480704227848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280431278 + ... + 280431281.

It is an arithmetic number, because the mean of its divisors is an integer number (420646920).

Almost surely, 2^1121725118 is an apocalyptic number.

1121725118 is a deficient number, since it is larger than the sum of its proper divisors (560862562).

1121725118 is an equidigital number, since it uses as much as digits as its factorization.

1121725118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560862561.

The product of its digits is 1120, while the sum is 29.

The square root of 1121725118 is about 33492.1650240769. The cubic root of 1121725118 is about 1039.0317411950.

Adding to 1121725118 its reverse (8115271211), we get a palindrome (9236996329).

The spelling of 1121725118 in words is "one billion, one hundred twenty-one million, seven hundred twenty-five thousand, one hundred eighteen".