1121555612 has 12 divisors (see below), whose sum is σ = 1992017160. Its totient is φ = 552407856.

The previous prime is 1121555593. The next prime is 1121555621. The reversal of 1121555612 is 2165551211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2092187 + ... + 2092722.

It is an arithmetic number, because the mean of its divisors is an integer number (166001430).

Almost surely, 2^1121555612 is an apocalyptic number.

It is an amenable number.

1121555612 is a deficient number, since it is larger than the sum of its proper divisors (870461548).

1121555612 is a wasteful number, since it uses less digits than its factorization.

1121555612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4184980 (or 4184978 counting only the distinct ones).

The product of its digits is 3000, while the sum is 29.

The square root of 1121555612 is about 33489.6343963322. The cubic root of 1121555612 is about 1038.9794018759.

It can be divided in two parts, 11 and 21555612, that multiplied together give a palindrome (237111732).

The spelling of 1121555612 in words is "one billion, one hundred twenty-one million, five hundred fifty-five thousand, six hundred twelve".