1121215275 has 18 divisors (see below), whose sum is σ = 2008221540. Its totient is φ = 597981360.

The previous prime is 1121215237. The next prime is 1121215279. The reversal of 1121215275 is 5725121211.

1121215275 is a `hidden beast` number, since 1 + 12 + 121 + 527 + 5 = 666.

It is not a de Polignac number, because 1121215275 - 2¹⁴ = 1121198891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121215279) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2491365 + ... + 2491814.

Almost surely, 2^1121215275 is an apocalyptic number.

1121215275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1121215275 is a deficient number, since it is larger than the sum of its proper divisors (887006265).

1121215275 is a wasteful number, since it uses less digits than its factorization.

1121215275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4983195 (or 4983187 counting only the distinct ones).

The product of its digits is 1400, while the sum is 27.

The square root of 1121215275 is about 33484.5527818426. The cubic root of 1121215275 is about 1038.8742981842.

Adding to 1121215275 its reverse (5725121211), we get a palindrome (6846336486).

The spelling of 1121215275 in words is "one billion, one hundred twenty-one million, two hundred fifteen thousand, two hundred seventy-five".