21033313213 has 8 divisors (see below), whose sum is σ = 22947600960. Its totient is φ = 19119386880.

The previous prime is 21033313211. The next prime is 21033313219. The reversal of 21033313213 is 31231333012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21033313213 - 2¹ = 21033313211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033313211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39453 + ... + 208861.

It is an arithmetic number, because the mean of its divisors is an integer number (2868450120).

Almost surely, 2^21033313213 is an apocalyptic number.

It is an amenable number.

21033313213 is a deficient number, since it is larger than the sum of its proper divisors (1914287747).

21033313213 is a wasteful number, since it uses less digits than its factorization.

21033313213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180707.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21033313213 its reverse (31231333012), we get a palindrome (52264646225).

The spelling of 21033313213 in words is "twenty-one billion, thirty-three million, three hundred thirteen thousand, two hundred thirteen".