21211011010211 has 8 divisors (see below), whose sum is σ = 23231473126848. Its totient is φ = 19205913625000.

The previous prime is 21211011010201. The next prime is 21211011010219. The reversal of 21211011010211 is 11201011011212.

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 21211011010211 - 2¹⁴ = 21211010993827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211011010219) 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, 3841179965 + ... + 3841185486.

It is an arithmetic number, because the mean of its divisors is an integer number (2903934140856).

Almost surely, 2^{21211011010211} is an apocalyptic number.

21211011010211 is a deficient number, since it is larger than the sum of its proper divisors (2020462116637).

21211011010211 is a wasteful number, since it uses less digits than its factorization.

21211011010211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7682365713.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21211011010211 its reverse (11201011011212), we get a palindrome (32412022021423).

The spelling of 21211011010211 in words is "twenty-one trillion, two hundred eleven billion, eleven million, ten thousand, two hundred eleven".