21111233110012 has 12 divisors (see below), whose sum is σ = 37076133595536. Its totient is φ = 10518052082720.

The previous prime is 21111233109979. The next prime is 21111233110021. The reversal of 21111233110012 is 21001133211112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9391116808 + ... + 9391119055.

It is an arithmetic number, because the mean of its divisors is an integer number (3089677799628).

Almost surely, 2^{21111233110012} is an apocalyptic number.

It is an amenable number.

21111233110012 is a deficient number, since it is larger than the sum of its proper divisors (15964900485524).

21111233110012 is a wasteful number, since it uses less digits than its factorization.

21111233110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18782236148 (or 18782236146 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 21111233110012 its reverse (21001133211112), we get a palindrome (42112366321124).

The spelling of 21111233110012 in words is "twenty-one trillion, one hundred eleven billion, two hundred thirty-three million, one hundred ten thousand, twelve".