1132121345 has 4 divisors (see below), whose sum is σ = 1358545620. Its totient is φ = 905697072.

The previous prime is 1132121339. The next prime is 1132121351. The reversal of 1132121345 is 5431212311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5431212311 = 7 ⋅775887473.

It is an interprime number because it is at equal distance from previous prime (1132121339) and next prime (1132121351).

It can be written as a sum of positive squares in 2 ways, for example, as 651678784 + 480442561 = 25528^2 + 21919^2 .

It is a cyclic number.

It is not a de Polignac number, because 1132121345 - 2⁶ = 1132121281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1132121345.

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, 113212130 + ... + 113212139.

It is an arithmetic number, because the mean of its divisors is an integer number (339636405).

Almost surely, 2^1132121345 is an apocalyptic number.

It is an amenable number.

1132121345 is a deficient number, since it is larger than the sum of its proper divisors (226424275).

1132121345 is an equidigital number, since it uses as much as digits as its factorization.

1132121345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226424274.

The product of its digits is 720, while the sum is 23.

The square root of 1132121345 is about 33647.0109370803. The cubic root of 1132121345 is about 1042.2318149561.

Adding to 1132121345 its reverse (5431212311), we get a palindrome (6563333656).

The spelling of 1132121345 in words is "one billion, one hundred thirty-two million, one hundred twenty-one thousand, three hundred forty-five".