21001211110011 has 32 divisors (see below), whose sum is σ = 30557890215936. Its totient is φ = 12723560244000.

The previous prime is 21001211109997. The next prime is 21001211110049. The reversal of 21001211110011 is 11001111210012.

It is not a de Polignac number, because 21001211110011 - 2¹⁹ = 21001210585723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21001211114011) 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, 2310105576 + ... + 2310114666.

It is an arithmetic number, because the mean of its divisors is an integer number (954934069248).

Almost surely, 2^{21001211110011} is an apocalyptic number.

21001211110011 is a deficient number, since it is larger than the sum of its proper divisors (9556679105925).

21001211110011 is a wasteful number, since it uses less digits than its factorization.

21001211110011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25863.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21001211110011 its reverse (11001111210012), we get a palindrome (32002322320023).

The spelling of 21001211110011 in words is "twenty-one trillion, one billion, two hundred eleven million, one hundred ten thousand, eleven".