211200021111001 has 12 divisors (see below), whose sum is σ = 228803300627580. Its totient is φ = 194862294681600.

The previous prime is 211200021110999. The next prime is 211200021111019. The reversal of 211200021111001 is 100111120002112.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 7730907763401 + 203469113347600 = 2780451^2 + 14264260^2 .

It is not a de Polignac number, because 211200021111001 - 2¹ = 211200021110999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211200021111091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 293135800 + ... + 293855401.

It is an arithmetic number, because the mean of its divisors is an integer number (19066941718965).

Almost surely, 2^{211200021111001} is an apocalyptic number.

It is an amenable number.

211200021111001 is a deficient number, since it is larger than the sum of its proper divisors (17603279516579).

211200021111001 is a wasteful number, since it uses less digits than its factorization.

211200021111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586993356 (or 586993343 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 211200021111001 its reverse (100111120002112), we get a palindrome (311311141113113).

The spelling of 211200021111001 in words is "two hundred eleven trillion, two hundred billion, twenty-one million, one hundred eleven thousand, one".