21110001123012 has 24 divisors (see below), whose sum is σ = 49267196596800. Its totient is φ = 7035163139616.

The previous prime is 21110001122989. The next prime is 21110001123019. The reversal of 21110001123012 is 21032110001112.

It is a junction number, because it is equal to n+sod(n) for n = 21110001122982 and 21110001123000.

It is not an unprimeable number, because it can be changed into a prime (21110001123019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187929187 + ... + 188041482.

It is an arithmetic number, because the mean of its divisors is an integer number (2052799858200).

Almost surely, 2^{21110001123012} is an apocalyptic number.

It is an amenable number.

21110001123012 is an abundant number, since it is smaller than the sum of its proper divisors (28157195473788).

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

21110001123012 is a wasteful number, since it uses less digits than its factorization.

21110001123012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375975355 (or 375975353 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21110001123012 its reverse (21032110001112), we get a palindrome (42142111124124).

The spelling of 21110001123012 in words is "twenty-one trillion, one hundred ten billion, one million, one hundred twenty-three thousand, twelve".