111037847443421 has 2 divisors, whose sum is σ = 111037847443422. Its totient is φ = 111037847443420.

The previous prime is 111037847443403. The next prime is 111037847443423. The reversal of 111037847443421 is 124344748730111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106889338012900 + 4148509430521 = 10338730^2 + 2036789^2 .

It is a cyclic number.

It is not a de Polignac number, because 111037847443421 - 2²⁶ = 111037780334557 is a prime.

Together with 111037847443423, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111037847443421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111037847443423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55518923721710 + 55518923721711.

It is an arithmetic number, because the mean of its divisors is an integer number (55518923721711).

Almost surely, 2^{111037847443421} is an apocalyptic number.

It is an amenable number.

111037847443421 is a deficient number, since it is larger than the sum of its proper divisors (1).

111037847443421 is an equidigital number, since it uses as much as digits as its factorization.

111037847443421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1806336, while the sum is 50.

The spelling of 111037847443421 in words is "one hundred eleven trillion, thirty-seven billion, eight hundred forty-seven million, four hundred forty-three thousand, four hundred twenty-one".