111200401021 has 4 divisors (see below), whose sum is σ = 111329855200. Its totient is φ = 111070946844.

The previous prime is 111200400967. The next prime is 111200401057. The reversal of 111200401021 is 120104002111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111200401021 - 2¹⁷ = 111200269949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111200400992 and 111200401010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111200401121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64725801 + ... + 64727518.

It is an arithmetic number, because the mean of its divisors is an integer number (27832463800).

Almost surely, 2^111200401021 is an apocalyptic number.

It is an amenable number.

111200401021 is a deficient number, since it is larger than the sum of its proper divisors (129454179).

111200401021 is an equidigital number, since it uses as much as digits as its factorization.

111200401021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129454178.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111200401021 its reverse (120104002111), we get a palindrome (231304403132).

The spelling of 111200401021 in words is "one hundred eleven billion, two hundred million, four hundred one thousand, twenty-one".