21233134061 has 2 divisors, whose sum is σ = 21233134062. Its totient is φ = 21233134060.

The previous prime is 21233134009. The next prime is 21233134183. The reversal of 21233134061 is 16043133212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17854037161 + 3379096900 = 133619^2 + 58130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21233134061 is a prime.

It is a super-3 number, since 3×21233134061³ (a number of 32 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21233134061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21233134661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616567030 + 10616567031.

It is an arithmetic number, because the mean of its divisors is an integer number (10616567031).

Almost surely, 2^21233134061 is an apocalyptic number.

It is an amenable number.

21233134061 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233134061 is an equidigital number, since it uses as much as digits as its factorization.

21233134061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 21233134061 its reverse (16043133212), we get a palindrome (37276267273).

The spelling of 21233134061 in words is "twenty-one billion, two hundred thirty-three million, one hundred thirty-four thousand, sixty-one".