21100110222012 has 96 divisors (see below), whose sum is σ = 55067253292800. Its totient is φ = 6249080005632.

The previous prime is 21100110221963. The next prime is 21100110222073. The reversal of 21100110222012 is 21022201100112.

It is a junction number, because it is equal to n+sod(n) for n = 21100110221982 and 21100110222000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8521087 + ... + 10714902.

It is an arithmetic number, because the mean of its divisors is an integer number (573617221800).

Almost surely, 2^{21100110222012} is an apocalyptic number.

It is an amenable number.

21100110222012 is an abundant number, since it is smaller than the sum of its proper divisors (33967143070788).

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

21100110222012 is a wasteful number, since it uses less digits than its factorization.

21100110222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19236315 (or 19236313 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21100110222012 its reverse (21022201100112), we get a palindrome (42122311322124).

The spelling of 21100110222012 in words is "twenty-one trillion, one hundred billion, one hundred ten million, two hundred twenty-two thousand, twelve".