111001420404221 has 24 divisors (see below), whose sum is σ = 116216864709120. Its totient is φ = 106011184790016.

The previous prime is 111001420404197. The next prime is 111001420404239. The reversal of 111001420404221 is 122404024100111.

It is not a de Polignac number, because 111001420404221 - 2²² = 111001416209917 is a prime.

It is a super-2 number, since 2×111001420404221² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111001420404241) 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, 930902621 + ... + 931021853.

It is an arithmetic number, because the mean of its divisors is an integer number (4842369362880).

Almost surely, 2^{111001420404221} is an apocalyptic number.

It is an amenable number.

111001420404221 is a deficient number, since it is larger than the sum of its proper divisors (5215444304899).

111001420404221 is a wasteful number, since it uses less digits than its factorization.

111001420404221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121985 (or 121962 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 111001420404221 its reverse (122404024100111), we get a palindrome (233405444504332).

The spelling of 111001420404221 in words is "one hundred eleven trillion, one billion, four hundred twenty million, four hundred four thousand, two hundred twenty-one".