100421745731819 has 2 divisors, whose sum is σ = 100421745731820. Its totient is φ = 100421745731818.

The previous prime is 100421745731807. The next prime is 100421745731873. The reversal of 100421745731819 is 918137547124001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100421745731819 - 2³² = 100417450764523 is a prime.

It is a super-2 number, since 2×100421745731819² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100421745730819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50210872865909 + 50210872865910.

It is an arithmetic number, because the mean of its divisors is an integer number (50210872865910).

Almost surely, 2^{100421745731819} is an apocalyptic number.

100421745731819 is a deficient number, since it is larger than the sum of its proper divisors (1).

100421745731819 is an equidigital number, since it uses as much as digits as its factorization.

100421745731819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 53.

The spelling of 100421745731819 in words is "one hundred trillion, four hundred twenty-one billion, seven hundred forty-five million, seven hundred thirty-one thousand, eight hundred nineteen".