1201212133 has 6 divisors (see below), whose sum is σ = 1320340742. Its totient is φ = 1092010920.

The previous prime is 1201212127. The next prime is 1201212157. The reversal of 1201212133 is 3312121021.

It can be written as a sum of positive squares in only one way, i.e., 684240964 + 516971169 = 26158^2 + 22737^2 .

It is not a de Polignac number, because 1201212133 - 2²⁹ = 664341221 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 (1205212133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4963566 + ... + 4963807.

Almost surely, 2^1201212133 is an apocalyptic number.

It is an amenable number.

1201212133 is a deficient number, since it is larger than the sum of its proper divisors (119128609).

1201212133 is an equidigital number, since it uses as much as digits as its factorization.

1201212133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9927395 (or 9927384 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1201212133 is about 34658.5073683216. The cubic root of 1201212133 is about 1063.0162497549.

Adding to 1201212133 its reverse (3312121021), we get a palindrome (4513333154).

The spelling of 1201212133 in words is "one billion, two hundred one million, two hundred twelve thousand, one hundred thirty-three".