21011122011202 has 8 divisors (see below), whose sum is σ = 31828729383612. Its totient is φ = 10401545550000.

The previous prime is 21011122011181. The next prime is 21011122011203. The reversal of 21011122011202 is 20211022111012.

It can be written as a sum of positive squares in 2 ways, for example, as 15946772342281 + 5064349668921 = 3993341^2 + 2250411^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21011122011203) by changing a digit.

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, 52007727549 + ... + 52007727952.

Almost surely, 2^{21011122011202} is an apocalyptic number.

21011122011202 is a deficient number, since it is larger than the sum of its proper divisors (10817607372410).

21011122011202 is a wasteful number, since it uses less digits than its factorization.

21011122011202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104015455604.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21011122011202 its reverse (20211022111012), we get a palindrome (41222144122214).

The spelling of 21011122011202 in words is "twenty-one trillion, eleven billion, one hundred twenty-two million, eleven thousand, two hundred two".