111343606421 has 2 divisors, whose sum is σ = 111343606422. Its totient is φ = 111343606420.

The previous prime is 111343606411. The next prime is 111343606433. The reversal of 111343606421 is 124606343111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59494039396 + 51849567025 = 243914^2 + 227705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111343606421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111343606411) 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 as a sum of consecutive naturals, namely, 55671803210 + 55671803211.

It is an arithmetic number, because the mean of its divisors is an integer number (55671803211).

Almost surely, 2^111343606421 is an apocalyptic number.

It is an amenable number.

111343606421 is a deficient number, since it is larger than the sum of its proper divisors (1).

111343606421 is an equidigital number, since it uses as much as digits as its factorization.

111343606421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

Adding to 111343606421 its reverse (124606343111), we get a palindrome (235949949532).

The spelling of 111343606421 in words is "one hundred eleven billion, three hundred forty-three million, six hundred six thousand, four hundred twenty-one".