21133301313 has 16 divisors (see below), whose sum is σ = 28378656000. Its totient is φ = 13988486400.

The previous prime is 21133301311. The next prime is 21133301353. The reversal of 21133301313 is 31310333112.

It is not a de Polignac number, because 21133301313 - 2¹ = 21133301311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21133301313.

It is not an unprimeable number, because it can be changed into a prime (21133301311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1243608 + ... + 1260486.

It is an arithmetic number, because the mean of its divisors is an integer number (1773666000).

Almost surely, 2^21133301313 is an apocalyptic number.

It is an amenable number.

21133301313 is a deficient number, since it is larger than the sum of its proper divisors (7245354687).

21133301313 is a wasteful number, since it uses less digits than its factorization.

21133301313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19832.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 21133301313 its reverse (31310333112), we get a palindrome (52443634425).

The spelling of 21133301313 in words is "twenty-one billion, one hundred thirty-three million, three hundred one thousand, three hundred thirteen".