111101000021 has 16 divisors (see below), whose sum is σ = 122480709120. Its totient is φ = 99936829680.

The previous prime is 111100999993. The next prime is 111101000069. The reversal of 111101000021 is 120000101111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111101000021 - 2¹⁸ = 111100737877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111100999972 and 111101000008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101000821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 931250 + ... + 1043756.

It is an arithmetic number, because the mean of its divisors is an integer number (7655044320).

Almost surely, 2^111101000021 is an apocalyptic number.

111101000021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111101000021 is a deficient number, since it is larger than the sum of its proper divisors (11379709099).

111101000021 is a wasteful number, since it uses less digits than its factorization.

111101000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113464.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 111101000021 its reverse (120000101111), we get a palindrome (231101101132).

The spelling of 111101000021 in words is "one hundred eleven billion, one hundred one million, twenty-one", and thus it is an aban number.