111000012021 has 24 divisors (see below), whose sum is σ = 163500068160. Its totient is φ = 72550094400.

The previous prime is 111000011987. The next prime is 111000012059. The reversal of 111000012021 is 120210000111.

It is a happy number.

It is not a de Polignac number, because 111000012021 - 2⁹ = 111000011509 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 = 111000011994 and 111000012012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111000010021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 370840 + ... + 599601.

It is an arithmetic number, because the mean of its divisors is an integer number (6812502840).

Almost surely, 2^111000012021 is an apocalyptic number.

It is an amenable number.

111000012021 is a deficient number, since it is larger than the sum of its proper divisors (52500056139).

111000012021 is a wasteful number, since it uses less digits than its factorization.

111000012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970697 (or 970694 counting only the distinct ones).

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

Adding to 111000012021 its reverse (120210000111), we get a palindrome (231210012132).

The spelling of 111000012021 in words is "one hundred eleven billion, twelve thousand, twenty-one".