21010133313 has 24 divisors (see below), whose sum is σ = 32781228480. Its totient is φ = 12890227680.

The previous prime is 21010133267. The next prime is 21010133323. The reversal of 21010133313 is 31333101012.

It is a happy number.

21010133313 is a `hidden beast` number, since 210 + 10 + 133 + 313 = 666.

It is not a de Polignac number, because 21010133313 - 2¹⁶ = 21010067777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21010133323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 232533 + ... + 309986.

It is an arithmetic number, because the mean of its divisors is an integer number (1365884520).

Almost surely, 2^21010133313 is an apocalyptic number.

It is an amenable number.

21010133313 is a deficient number, since it is larger than the sum of its proper divisors (11771095167).

21010133313 is a wasteful number, since it uses less digits than its factorization.

21010133313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542869 (or 542866 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 21010133313 its reverse (31333101012), we get a palindrome (52343234325).

It can be divided in two parts, 2101013 and 3313, that added together give a triangular number (2104326 = T₂₀₅₁).

The spelling of 21010133313 in words is "twenty-one billion, ten million, one hundred thirty-three thousand, three hundred thirteen".