1233121045 has 16 divisors (see below), whose sum is σ = 1600430832. Its totient is φ = 906693120.

The previous prime is 1233121031. The next prime is 1233121049. The reversal of 1233121045 is 5401213321.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 8191044 + 1224930001 = 2862^2 + 34999^2 .

It is not a de Polignac number, because 1233121045 - 2⁹ = 1233120533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233121049) 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, 25566 + ... + 55855.

It is an arithmetic number, because the mean of its divisors is an integer number (100026927).

Almost surely, 2^1233121045 is an apocalyptic number.

It is an amenable number.

1233121045 is a deficient number, since it is larger than the sum of its proper divisors (367309787).

1233121045 is a wasteful number, since it uses less digits than its factorization.

1233121045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81672.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1233121045 is about 35115.8232852371. The cubic root of 1233121045 is about 1072.3467417748.

Adding to 1233121045 its reverse (5401213321), we get a palindrome (6634334366).

The spelling of 1233121045 in words is "one billion, two hundred thirty-three million, one hundred twenty-one thousand, forty-five".