21012100210211 has 16 divisors (see below), whose sum is σ = 23925500955648. Its totient is φ = 18266358633600.

The previous prime is 21012100210207. The next prime is 21012100210219. The reversal of 21012100210211 is 11201200121012.

It is not a de Polignac number, because 21012100210211 - 2² = 21012100210207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21012100210219) 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, 10517846 + ... + 12355131.

It is an arithmetic number, because the mean of its divisors is an integer number (1495343809728).

Almost surely, 2^{21012100210211} is an apocalyptic number.

21012100210211 is a deficient number, since it is larger than the sum of its proper divisors (2913400745437).

21012100210211 is a wasteful number, since it uses less digits than its factorization.

21012100210211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22876642.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21012100210211 its reverse (11201200121012), we get a palindrome (32213300331223).

The spelling of 21012100210211 in words is "twenty-one trillion, twelve billion, one hundred million, two hundred ten thousand, two hundred eleven".