211162421005 has 16 divisors (see below), whose sum is σ = 254561065200. Its totient is φ = 168152946688.

The previous prime is 211162420993. The next prime is 211162421009. The reversal of 211162421005 is 500124261112.

It can be written as a sum of positive squares in 8 ways, for example, as 22670120356 + 188492300649 = 150566^2 + 434157^2 .

It is a cyclic number.

It is not a de Polignac number, because 211162421005 - 2²¹ = 211160323853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211162421009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3991809 + ... + 4044361.

It is an arithmetic number, because the mean of its divisors is an integer number (15910066575).

Almost surely, 2^211162421005 is an apocalyptic number.

It is an amenable number.

211162421005 is a deficient number, since it is larger than the sum of its proper divisors (43398644195).

211162421005 is a wasteful number, since it uses less digits than its factorization.

211162421005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56240.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 211162421005 its reverse (500124261112), we get a palindrome (711286682117).

The spelling of 211162421005 in words is "two hundred eleven billion, one hundred sixty-two million, four hundred twenty-one thousand, five".