1213133045 has 16 divisors (see below), whose sum is σ = 1520104320. Its totient is φ = 927668544.

The previous prime is 1213133041. The next prime is 1213133093. The reversal of 1213133045 is 5403313121.

It is a cyclic number.

It is not a de Polignac number, because 1213133045 - 2² = 1213133041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 1213133045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213133041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225851 + ... + 231159.

It is an arithmetic number, because the mean of its divisors is an integer number (95006520).

Almost surely, 2^1213133045 is an apocalyptic number.

It is an amenable number.

1213133045 is a deficient number, since it is larger than the sum of its proper divisors (306971275).

1213133045 is a wasteful number, since it uses less digits than its factorization.

1213133045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7324.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1213133045 is about 34830.0595032509. The cubic root of 1213133045 is about 1066.5211630413.

Adding to 1213133045 its reverse (5403313121), we get a palindrome (6616446166).

The spelling of 1213133045 in words is "one billion, two hundred thirteen million, one hundred thirty-three thousand, forty-five".