21332033234621 has 2 divisors, whose sum is σ = 21332033234622. Its totient is φ = 21332033234620.

The previous prime is 21332033234587. The next prime is 21332033234641. The reversal of 21332033234621 is 12643233023312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18696232279396 + 2635800955225 = 4323914^2 + 1623515^2 .

It is a cyclic number.

It is not a de Polignac number, because 21332033234621 - 2¹⁸ = 21332032972477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21332033234641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666016617310 + 10666016617311.

It is an arithmetic number, because the mean of its divisors is an integer number (10666016617311).

Almost surely, 2^{21332033234621} is an apocalyptic number.

It is an amenable number.

21332033234621 is a deficient number, since it is larger than the sum of its proper divisors (1).

21332033234621 is an equidigital number, since it uses as much as digits as its factorization.

21332033234621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 35.

Adding to 21332033234621 its reverse (12643233023312), we get a palindrome (33975266257933).

The spelling of 21332033234621 in words is "twenty-one trillion, three hundred thirty-two billion, thirty-three million, two hundred thirty-four thousand, six hundred twenty-one".