111203422421 has 16 divisors (see below), whose sum is σ = 137181886464. Its totient is φ = 87781895424.

The previous prime is 111203422403. The next prime is 111203422457. The reversal of 111203422421 is 124224302111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111203422421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111203422621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1371701 + ... + 1450506.

It is an arithmetic number, because the mean of its divisors is an integer number (8573867904).

Almost surely, 2^111203422421 is an apocalyptic number.

It is an amenable number.

111203422421 is a deficient number, since it is larger than the sum of its proper divisors (25978464043).

111203422421 is a wasteful number, since it uses less digits than its factorization.

111203422421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2822660.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 111203422421 its reverse (124224302111), we get a palindrome (235427724532).

The spelling of 111203422421 in words is "one hundred eleven billion, two hundred three million, four hundred twenty-two thousand, four hundred twenty-one".