21013233020213 has 16 divisors (see below), whose sum is σ = 24472635045120. Its totient is φ = 17668331006976.

The previous prime is 21013233020209. The next prime is 21013233020243. The reversal of 21013233020213 is 31202033231012.

It is a cyclic number.

It is not a de Polignac number, because 21013233020213 - 2² = 21013233020209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013233020243) 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, 3019145 + ... + 7151342.

It is an arithmetic number, because the mean of its divisors is an integer number (1529539690320).

Almost surely, 2^{21013233020213} is an apocalyptic number.

It is an amenable number.

21013233020213 is a deficient number, since it is larger than the sum of its proper divisors (3459402024907).

21013233020213 is a wasteful number, since it uses less digits than its factorization.

21013233020213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10176116.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21013233020213 its reverse (31202033231012), we get a palindrome (52215266251225).

The spelling of 21013233020213 in words is "twenty-one trillion, thirteen billion, two hundred thirty-three million, twenty thousand, two hundred thirteen".