21010021210333 has 2 divisors, whose sum is σ = 21010021210334. Its totient is φ = 21010021210332.

The previous prime is 21010021210291. The next prime is 21010021210337. The reversal of 21010021210333 is 33301212001012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19832887348569 + 1177133861764 = 4453413^2 + 1084958^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010021210333 - 2²⁵ = 21009987655901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21010021210333.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21010021210337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505010605166 + 10505010605167.

It is an arithmetic number, because the mean of its divisors is an integer number (10505010605167).

Almost surely, 2^{21010021210333} is an apocalyptic number.

It is an amenable number.

21010021210333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010021210333 is an equidigital number, since it uses as much as digits as its factorization.

21010021210333 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 21010021210333 its reverse (33301212001012), we get a palindrome (54311233211345).

The spelling of 21010021210333 in words is "twenty-one trillion, ten billion, twenty-one million, two hundred ten thousand, three hundred thirty-three".