21011210020011 has 32 divisors (see below), whose sum is σ = 28752903590400. Its totient is φ = 13642895784960.

The previous prime is 21011210019977. The next prime is 21011210020037. The reversal of 21011210020011 is 11002001211012.

It is not a de Polignac number, because 21011210020011 - 2¹⁴ = 21011210003627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21011280020011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 569838906 + ... + 569875776.

It is an arithmetic number, because the mean of its divisors is an integer number (898528237200).

Almost surely, 2^{21011210020011} is an apocalyptic number.

21011210020011 is a deficient number, since it is larger than the sum of its proper divisors (7741693570389).

21011210020011 is a wasteful number, since it uses less digits than its factorization.

21011210020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66579.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21011210020011 its reverse (11002001211012), we get a palindrome (32013211231023).

The spelling of 21011210020011 in words is "twenty-one trillion, eleven billion, two hundred ten million, twenty thousand, eleven".