21010233333337 has 2 divisors, whose sum is σ = 21010233333338. Its totient is φ = 21010233333336.

The previous prime is 21010233333307. The next prime is 21010233333379. The reversal of 21010233333337 is 73333333201012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16963038941641 + 4047194391696 = 4118621^2 + 2011764^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010233333337 - 2²³ = 21010224944729 is a prime.

It is not a weakly prime, because it can be changed into another prime (21010233333307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505116666668 + 10505116666669.

It is an arithmetic number, because the mean of its divisors is an integer number (10505116666669).

Almost surely, 2^{21010233333337} is an apocalyptic number.

It is an amenable number.

21010233333337 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010233333337 is an equidigital number, since it uses as much as digits as its factorization.

21010233333337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 34.

Adding to 21010233333337 its reverse (73333333201012), we get a palindrome (94343566534349).

The spelling of 21010233333337 in words is "twenty-one trillion, ten billion, two hundred thirty-three million, three hundred thirty-three thousand, three hundred thirty-seven".