1131122145 has 32 divisors (see below), whose sum is σ = 1871372160. Its totient is φ = 583016960.

The previous prime is 1131122143. The next prime is 1131122233. The reversal of 1131122145 is 5412211311.

1131122145 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1131122145 - 2¹ = 1131122143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131122143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57211 + ... + 74399.

It is an arithmetic number, because the mean of its divisors is an integer number (58480380).

Almost surely, 2^1131122145 is an apocalyptic number.

1131122145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131122145 is a deficient number, since it is larger than the sum of its proper divisors (740250015).

1131122145 is a wasteful number, since it uses less digits than its factorization.

1131122145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17345.

The product of its digits is 240, while the sum is 21.

The square root of 1131122145 is about 33632.1593865158. The cubic root of 1131122145 is about 1041.9251032652.

Adding to 1131122145 its reverse (5412211311), we get a palindrome (6543333456).

The spelling of 1131122145 in words is "one billion, one hundred thirty-one million, one hundred twenty-two thousand, one hundred forty-five".