21112111201104 has 240 divisors, whose sum is σ = 74115835282944. Its totient is φ = 5450022662400.

The previous prime is 21112111201099. The next prime is 21112111201141. The reversal of 21112111201104 is 40110211121112.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4033302 + ... + 7647989.

Almost surely, 2^{21112111201104} is an apocalyptic number.

21112111201104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21112111201104 is an abundant number, since it is smaller than the sum of its proper divisors (53003724081840).

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

21112111201104 is a wasteful number, since it uses less digits than its factorization.

21112111201104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11681486 (or 11681477 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 21112111201104 its reverse (40110211121112), we get a palindrome (61222322322216).

The spelling of 21112111201104 in words is "twenty-one trillion, one hundred twelve billion, one hundred eleven million, two hundred one thousand, one hundred four".