21002113211 has 8 divisors (see below), whose sum is σ = 22328745120. Its totient is φ = 19709939392.

The previous prime is 21002113193. The next prime is 21002113243. The reversal of 21002113211 is 11231120012.

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 21002113211 - 2¹⁴ = 21002096827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002113261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8613266 + ... + 8615703.

It is an arithmetic number, because the mean of its divisors is an integer number (2791093140).

Almost surely, 2^21002113211 is an apocalyptic number.

21002113211 is a deficient number, since it is larger than the sum of its proper divisors (1326631909).

21002113211 is a wasteful number, since it uses less digits than its factorization.

21002113211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17229045.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21002113211 its reverse (11231120012), we get a palindrome (32233233223).

The spelling of 21002113211 in words is "twenty-one billion, two million, one hundred thirteen thousand, two hundred eleven".