1230202133 has 4 divisors (see below), whose sum is σ = 1253413548. Its totient is φ = 1206990720.

The previous prime is 1230202123. The next prime is 1230202147. The reversal of 1230202133 is 3312020321.

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 929457169 + 300744964 = 30487^2 + 17342^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230202133 - 2¹² = 1230198037 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 (1230202123) 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, 11605628 + ... + 11605733.

It is an arithmetic number, because the mean of its divisors is an integer number (313353387).

Almost surely, 2^1230202133 is an apocalyptic number.

It is an amenable number.

1230202133 is a deficient number, since it is larger than the sum of its proper divisors (23211415).

1230202133 is an equidigital number, since it uses as much as digits as its factorization.

1230202133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23211414.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1230202133 is about 35074.2374542911. The cubic root of 1230202133 is about 1071.4999585189.

Adding to 1230202133 its reverse (3312020321), we get a palindrome (4542222454).

The spelling of 1230202133 in words is "one billion, two hundred thirty million, two hundred two thousand, one hundred thirty-three".