21010220110012 has 48 divisors (see below), whose sum is σ = 42328526950080. Its totient is φ = 8938365714432.

The previous prime is 21010220109947. The next prime is 21010220110049. The reversal of 21010220110012 is 21001102201012.

It is a junction number, because it is equal to n+sod(n) for n = 21010220109974 and 21010220110001.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 153191164 + ... + 153328252.

It is an arithmetic number, because the mean of its divisors is an integer number (881844311460).

Almost surely, 2^{21010220110012} is an apocalyptic number.

It is an amenable number.

21010220110012 is an abundant number, since it is smaller than the sum of its proper divisors (21318306840068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21010220110012 is a wasteful number, since it uses less digits than its factorization.

21010220110012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177190 (or 177188 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21010220110012 its reverse (21001102201012), we get a palindrome (42011322311024).

It can be divided in two parts, 21010 and 220110012, that added together give a palindrome (220131022).

The spelling of 21010220110012 in words is "twenty-one trillion, ten billion, two hundred twenty million, one hundred ten thousand, twelve".