21110110001012 has 48 divisors (see below), whose sum is σ = 38379395303424. Its totient is φ = 10151876448000.

The previous prime is 21110110000997. The next prime is 21110110001051. The reversal of 21110110001012 is 21010001101112.

It is a junction number, because it is equal to n+sod(n) for n = 21110110000984 and 21110110001002.

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, 194435462 + ... + 194544002.

It is an arithmetic number, because the mean of its divisors is an integer number (799570735488).

Almost surely, 2^{21110110001012} is an apocalyptic number.

It is an amenable number.

21110110001012 is a deficient number, since it is larger than the sum of its proper divisors (17269285302412).

21110110001012 is a wasteful number, since it uses less digits than its factorization.

21110110001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125360 (or 125358 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21110110001012 its reverse (21010001101112), we get a palindrome (42120111102124).

The spelling of 21110110001012 in words is "twenty-one trillion, one hundred ten billion, one hundred ten million, one thousand, twelve".