1201213133 has 4 divisors (see below), whose sum is σ = 1201381020. Its totient is φ = 1201045248.

The previous prime is 1201213129. The next prime is 1201213187. The reversal of 1201213133 is 3313121021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 377408329 + 823804804 = 19427^2 + 28702^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201213133 - 2² = 1201213129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201213033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72710 + ... + 87687.

It is an arithmetic number, because the mean of its divisors is an integer number (300345255).

Almost surely, 2^1201213133 is an apocalyptic number.

It is an amenable number.

1201213133 is a deficient number, since it is larger than the sum of its proper divisors (167887).

1201213133 is an equidigital number, since it uses as much as digits as its factorization.

1201213133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167886.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1201213133 is about 34658.5217947910. The cubic root of 1201213133 is about 1063.0165447392.

Adding to 1201213133 its reverse (3313121021), we get a palindrome (4514334154).

The spelling of 1201213133 in words is "one billion, two hundred one million, two hundred thirteen thousand, one hundred thirty-three".