21010110110012 has 24 divisors (see below), whose sum is σ = 38702982449040. Its totient is φ = 9952119354240.

The previous prime is 21010110109997. The next prime is 21010110110063. The reversal of 21010110110012 is 21001101101012.

It is a junction number, because it is equal to n+sod(n) for n = 21010110109975 and 21010110110002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35675462 + ... + 36259602.

It is an arithmetic number, because the mean of its divisors is an integer number (1612624268710).

Almost surely, 2^{21010110110012} is an apocalyptic number.

It is an amenable number.

21010110110012 is a deficient number, since it is larger than the sum of its proper divisors (17692872339028).

21010110110012 is a wasteful number, since it uses less digits than its factorization.

21010110110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057421 (or 1057419 counting only the distinct ones).

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

Adding to 21010110110012 its reverse (21001101101012), we get a palindrome (42011211211024).

The spelling of 21010110110012 in words is "twenty-one trillion, ten billion, one hundred ten million, one hundred ten thousand, twelve".