211200011010021 has 128 divisors (see below), whose sum is σ = 346123241717760. Its totient is φ = 112887903744000.

The previous prime is 211200011010011. The next prime is 211200011010067. The reversal of 211200011010021 is 120010110002112.

It is not a de Polignac number, because 211200011010021 - 2³⁰ = 211198937268197 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211200011009979 and 211200011010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211200011010011) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1090457436 + ... + 1090651098.

It is an arithmetic number, because the mean of its divisors is an integer number (2704087825920).

Almost surely, 2^{211200011010021} is an apocalyptic number.

It is an amenable number.

211200011010021 is a deficient number, since it is larger than the sum of its proper divisors (134923230707739).

211200011010021 is a wasteful number, since it uses less digits than its factorization.

211200011010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194827.

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

Adding to 211200011010021 its reverse (120010110002112), we get a palindrome (331210121012133).

The spelling of 211200011010021 in words is "two hundred eleven trillion, two hundred billion, eleven million, ten thousand, twenty-one".