10111200000021 has 48 divisors (see below), whose sum is σ = 14981321811456. Its totient is φ = 6567920559648.

The previous prime is 10111199999951. The next prime is 10111200000053. The reversal of 10111200000021 is 12000000211101.

It is a happy number.

10111200000021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10111200000021 - 2¹⁰ = 10111199998997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10111199999949 and 10111200000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111200000071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 788514216 + ... + 788527038.

It is an arithmetic number, because the mean of its divisors is an integer number (312110871072).

Almost surely, 2^{10111200000021} is an apocalyptic number.

It is an amenable number.

10111200000021 is a deficient number, since it is larger than the sum of its proper divisors (4870121811435).

10111200000021 is a wasteful number, since it uses less digits than its factorization.

10111200000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17702 (or 17699 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10111200000021 its reverse (12000000211101), we get a palindrome (22111200211122).

The spelling of 10111200000021 in words is "ten trillion, one hundred eleven billion, two hundred million, twenty-one", and thus it is an aban number.