111245823421 has 2 divisors, whose sum is σ = 111245823422. Its totient is φ = 111245823420.

The previous prime is 111245823401. The next prime is 111245823457. The reversal of 111245823421 is 124328542111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110227320025 + 1018503396 = 332005^2 + 31914^2 .

It is a cyclic number.

It is not a de Polignac number, because 111245823421 - 2⁵ = 111245823389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111245823401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55622911710 + 55622911711.

It is an arithmetic number, because the mean of its divisors is an integer number (55622911711).

Almost surely, 2^111245823421 is an apocalyptic number.

It is an amenable number.

111245823421 is a deficient number, since it is larger than the sum of its proper divisors (1).

111245823421 is an equidigital number, since it uses as much as digits as its factorization.

111245823421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 34.

The spelling of 111245823421 in words is "one hundred eleven billion, two hundred forty-five million, eight hundred twenty-three thousand, four hundred twenty-one".