1156221110 has 16 divisors (see below), whose sum is σ = 2270398032. Its totient is φ = 420444000.

The previous prime is 1156221091. The next prime is 1156221113. The reversal of 1156221110 is 111226511.

1156221110 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156221113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5255441 + ... + 5255660.

It is an arithmetic number, because the mean of its divisors is an integer number (141899877).

Almost surely, 2^1156221110 is an apocalyptic number.

1156221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1156221110 is a deficient number, since it is larger than the sum of its proper divisors (1114176922).

1156221110 is a wasteful number, since it uses less digits than its factorization.

1156221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10511119.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 1156221110 is about 34003.2514621764. The cubic root of 1156221110 is about 1049.5753717620.

Adding to 1156221110 its reverse (111226511), we get a palindrome (1267447621).

The spelling of 1156221110 in words is "one billion, one hundred fifty-six million, two hundred twenty-one thousand, one hundred ten".