21002112223011 has 12 divisors (see below), whose sum is σ = 30337603512840. Its totient is φ = 14000845445280.

The previous prime is 21002112223007. The next prime is 21002112223021. The reversal of 21002112223011 is 11032221120012.

21002112223011 is a `hidden beast` number, since 210 + 0 + 211 + 2 + 2 + 230 + 11 = 666.

It is not a de Polignac number, because 21002112223011 - 2² = 21002112223007 is a prime.

It is a super-2 number, since 2×21002112223011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21002112223021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46655505 + ... + 47103506.

It is an arithmetic number, because the mean of its divisors is an integer number (2528133626070).

Almost surely, 2^{21002112223011} is an apocalyptic number.

21002112223011 is a deficient number, since it is larger than the sum of its proper divisors (9335491289829).

21002112223011 is a wasteful number, since it uses less digits than its factorization.

21002112223011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93783906 (or 93783903 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21002112223011 its reverse (11032221120012), we get a palindrome (32034333343023).

The spelling of 21002112223011 in words is "twenty-one trillion, two billion, one hundred twelve million, two hundred twenty-three thousand, eleven".