21101003213 has 8 divisors (see below), whose sum is σ = 21791278080. Its totient is φ = 20411328240.

The previous prime is 21101003207. The next prime is 21101003237. The reversal of 21101003213 is 31230010112.

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

It is a cyclic number.

It is not a de Polignac number, because 21101003213 - 2²⁰ = 21099954637 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 (21101003263) 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, 77918 + ... + 219711.

It is an arithmetic number, because the mean of its divisors is an integer number (2723909760).

Almost surely, 2^21101003213 is an apocalyptic number.

It is an amenable number.

21101003213 is a deficient number, since it is larger than the sum of its proper divisors (690274867).

21101003213 is a wasteful number, since it uses less digits than its factorization.

21101003213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299947.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21101003213 its reverse (31230010112), we get a palindrome (52331013325).

The spelling of 21101003213 in words is "twenty-one billion, one hundred one million, three thousand, two hundred thirteen".