21000133203310 has 16 divisors (see below), whose sum is σ = 38364422450256. Its totient is φ = 8274679351488.

The previous prime is 21000133203209. The next prime is 21000133203409. The reversal of 21000133203310 is 1330233100012.

It is a super-2 number, since 2×21000133203310² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15671740527 + ... + 15671741866.

It is an arithmetic number, because the mean of its divisors is an integer number (2397776403141).

Almost surely, 2^{21000133203310} is an apocalyptic number.

21000133203310 is a deficient number, since it is larger than the sum of its proper divisors (17364289246946).

21000133203310 is a wasteful number, since it uses less digits than its factorization.

21000133203310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31343482467.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21000133203310 its reverse (1330233100012), we get a palindrome (22330366303322).

The spelling of 21000133203310 in words is "twenty-one trillion, one hundred thirty-three million, two hundred three thousand, three hundred ten".