111421104023421 has 32 divisors (see below), whose sum is σ = 175000284535680. Its totient is φ = 69822448098048.

The previous prime is 111421104023417. The next prime is 111421104023443. The reversal of 111421104023421 is 124320401124111.

111421104023421 is a `hidden beast` number, since 1 + 1 + 1 + 4 + 211 + 0 + 4 + 0 + 23 + 421 = 666.

It is not a de Polignac number, because 111421104023421 - 2² = 111421104023417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111421104023321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153862086 + ... + 154584551.

It is an arithmetic number, because the mean of its divisors is an integer number (5468758891740).

Almost surely, 2^{111421104023421} is an apocalyptic number.

It is an amenable number.

111421104023421 is a deficient number, since it is larger than the sum of its proper divisors (63579180512259).

111421104023421 is a wasteful number, since it uses less digits than its factorization.

111421104023421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308447450 (or 308447444 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

Adding to 111421104023421 its reverse (124320401124111), we get a palindrome (235741505147532).

The spelling of 111421104023421 in words is "one hundred eleven trillion, four hundred twenty-one billion, one hundred four million, twenty-three thousand, four hundred twenty-one".