211242221044 has 6 divisors (see below), whose sum is σ = 369673886834. Its totient is φ = 105621110520.

The previous prime is 211242221041. The next prime is 211242221053. The reversal of 211242221044 is 440122242112.

It can be written as a sum of positive squares in only one way, i.e., 157798028644 + 53444192400 = 397238^2 + 231180^2 .

It is a super-3 number, since 3×211242221044³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211242221041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26405277627 + ... + 26405277634.

Almost surely, 2^211242221044 is an apocalyptic number.

It is an amenable number.

211242221044 is a deficient number, since it is larger than the sum of its proper divisors (158431665790).

211242221044 is a wasteful number, since it uses less digits than its factorization.

211242221044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52810555265 (or 52810555263 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 211242221044 its reverse (440122242112), we get a palindrome (651364463156).

The spelling of 211242221044 in words is "two hundred eleven billion, two hundred forty-two million, two hundred twenty-one thousand, forty-four".