1121440215 has 128 divisors (see below), whose sum is σ = 2215065600. Its totient is φ = 483646464.

The previous prime is 1121440181. The next prime is 1121440219. The reversal of 1121440215 is 5120441211.

It is not a de Polignac number, because 1121440215 - 2⁷ = 1121440087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1121440191 and 1121440200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121440219) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8185627 + ... + 8185763.

It is an arithmetic number, because the mean of its divisors is an integer number (17305200).

Almost surely, 2^1121440215 is an apocalyptic number.

1121440215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1121440215 is a deficient number, since it is larger than the sum of its proper divisors (1093625385).

1121440215 is a wasteful number, since it uses less digits than its factorization.

1121440215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1121440215 is about 33487.9114756355. The cubic root of 1121440215 is about 1038.9437670793.

Adding to 1121440215 its reverse (5120441211), we get a palindrome (6241881426).

The spelling of 1121440215 in words is "one billion, one hundred twenty-one million, four hundred forty thousand, two hundred fifteen".