21211001211122 has 8 divisors (see below), whose sum is σ = 31894292775900. Its totient is φ = 10579570285824.

The previous prime is 21211001211083. The next prime is 21211001211133. The reversal of 21211001211122 is 22111210011212.

It can be written as a sum of positive squares in 2 ways, for example, as 18367558776121 + 2843442435001 = 4285739^2 + 1686251^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21211001211122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12965158847 + ... + 12965160482.

Almost surely, 2^{21211001211122} is an apocalyptic number.

21211001211122 is a deficient number, since it is larger than the sum of its proper divisors (10683291564778).

21211001211122 is a wasteful number, since it uses less digits than its factorization.

21211001211122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25930319740.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21211001211122 its reverse (22111210011212), we get a palindrome (43322211222334).

The spelling of 21211001211122 in words is "twenty-one trillion, two hundred eleven billion, one million, two hundred eleven thousand, one hundred twenty-two".