21032112133 has 2 divisors, whose sum is σ = 21032112134. Its totient is φ = 21032112132.

The previous prime is 21032112083. The next prime is 21032112209. The reversal of 21032112133 is 33121123012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18443541249 + 2588570884 = 135807^2 + 50878^2 .

It is a cyclic number.

It is not a de Polignac number, because 21032112133 - 2³³ = 12442177541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21032112133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21032182133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516056066 + 10516056067.

It is an arithmetic number, because the mean of its divisors is an integer number (10516056067).

Almost surely, 2^21032112133 is an apocalyptic number.

It is an amenable number.

21032112133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21032112133 is an equidigital number, since it uses as much as digits as its factorization.

21032112133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21032112133 its reverse (33121123012), we get a palindrome (54153235145).

The spelling of 21032112133 in words is "twenty-one billion, thirty-two million, one hundred twelve thousand, one hundred thirty-three".