21001200011011 has 32 divisors (see below), whose sum is σ = 24478562534400. Its totient is φ = 17815447061280.

The previous prime is 21001200010979. The next prime is 21001200011047. The reversal of 21001200011011 is 11011000210012.

It is not a de Polignac number, because 21001200011011 - 2⁵ = 21001200010979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21001200011081) 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, 153670636 + ... + 153807238.

It is an arithmetic number, because the mean of its divisors is an integer number (764955079200).

Almost surely, 2^{21001200011011} is an apocalyptic number.

21001200011011 is a deficient number, since it is larger than the sum of its proper divisors (3477362523389).

21001200011011 is a wasteful number, since it uses less digits than its factorization.

21001200011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147679.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21001200011011 its reverse (11011000210012), we get a palindrome (32012200221023).

The spelling of 21001200011011 in words is "twenty-one trillion, one billion, two hundred million, eleven thousand, eleven".