21113201021011 has 32 divisors (see below), whose sum is σ = 24353284838400. Its totient is φ = 18102448334880.

The previous prime is 21113201020991. The next prime is 21113201021021. The reversal of 21113201021011 is 11012010231112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21113201021011 - 2¹³ = 21113201012819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21113201021021) 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, 43084776 + ... + 43572058.

It is an arithmetic number, because the mean of its divisors is an integer number (761040151200).

Almost surely, 2^{21113201021011} is an apocalyptic number.

21113201021011 is a deficient number, since it is larger than the sum of its proper divisors (3240083817389).

21113201021011 is a wasteful number, since it uses less digits than its factorization.

21113201021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488239.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 21113201021011 its reverse (11012010231112), we get a palindrome (32125211252123).

The spelling of 21113201021011 in words is "twenty-one trillion, one hundred thirteen billion, two hundred one million, twenty-one thousand, eleven".