211144400101 has 4 divisors (see below), whose sum is σ = 211146669292. Its totient is φ = 211142130912.

The previous prime is 211144400099. The next prime is 211144400113. The reversal of 211144400101 is 101004441112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63327219201 + 147817180900 = 251649^2 + 384470^2 .

It is a cyclic number.

It is not a de Polignac number, because 211144400101 - 2¹ = 211144400099 is a prime.

It is a super-2 number, since 2×211144400101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211144400191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 988776 + ... + 1183201.

It is an arithmetic number, because the mean of its divisors is an integer number (52786667323).

Almost surely, 2^211144400101 is an apocalyptic number.

It is an amenable number.

211144400101 is a deficient number, since it is larger than the sum of its proper divisors (2269191).

211144400101 is an equidigital number, since it uses as much as digits as its factorization.

211144400101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2269190.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 211144400101 its reverse (101004441112), we get a palindrome (312148841213).

The spelling of 211144400101 in words is "two hundred eleven billion, one hundred forty-four million, four hundred thousand, one hundred one".