421111200111 has 16 divisors (see below), whose sum is σ = 649424504064. Its totient is φ = 237735753984.

The previous prime is 421111200061. The next prime is 421111200137. The reversal of 421111200111 is 111002111124.

It is a happy number.

It is not a de Polignac number, because 421111200111 - 2⁶ = 421111200047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421111200161) 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, 120798946 + ... + 120802431.

It is an arithmetic number, because the mean of its divisors is an integer number (40589031504).

Almost surely, 2^421111200111 is an apocalyptic number.

421111200111 is a deficient number, since it is larger than the sum of its proper divisors (228313303953).

421111200111 is a wasteful number, since it uses less digits than its factorization.

421111200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241601470.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 421111200111 its reverse (111002111124), we get a palindrome (532113311235).

The spelling of 421111200111 in words is "four hundred twenty-one billion, one hundred eleven million, two hundred thousand, one hundred eleven".