421101111247 has 2 divisors, whose sum is σ = 421101111248. Its totient is φ = 421101111246.

The previous prime is 421101111199. The next prime is 421101111253. The reversal of 421101111247 is 742111101124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421101111247 - 2²⁷ = 420966893519 is a prime.

It is a super-2 number, since 2×421101111247² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421108111247) 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, 210550555623 + 210550555624.

It is an arithmetic number, because the mean of its divisors is an integer number (210550555624).

Almost surely, 2^421101111247 is an apocalyptic number.

421101111247 is a deficient number, since it is larger than the sum of its proper divisors (1).

421101111247 is an equidigital number, since it uses as much as digits as its factorization.

421101111247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 25.

The spelling of 421101111247 in words is "four hundred twenty-one billion, one hundred one million, one hundred eleven thousand, two hundred forty-seven".