1121131506 has 16 divisors (see below), whose sum is σ = 2446105248. Its totient is φ = 339736800.

The previous prime is 1121131493. The next prime is 1121131549. The reversal of 1121131506 is 6051311211.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8493355 + ... + 8493486.

It is an arithmetic number, because the mean of its divisors is an integer number (152881578).

Almost surely, 2^1121131506 is an apocalyptic number.

1121131506 is an abundant number, since it is smaller than the sum of its proper divisors (1324973742).

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

1121131506 is a wasteful number, since it uses less digits than its factorization.

1121131506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16986857.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 1121131506 is about 33483.3018981103. The cubic root of 1121131506 is about 1038.8484251783.

Adding to 1121131506 its reverse (6051311211), we get a palindrome (7172442717).

The spelling of 1121131506 in words is "one billion, one hundred twenty-one million, one hundred thirty-one thousand, five hundred six".