421021103 has 2 divisors, whose sum is σ = 421021104. Its totient is φ = 421021102.

The previous prime is 421021093. The next prime is 421021121. The reversal of 421021103 is 301120124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421021103 - 2¹⁶ = 420955567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421021123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210510551 + 210510552.

It is an arithmetic number, because the mean of its divisors is an integer number (210510552).

Almost surely, 2^421021103 is an apocalyptic number.

421021103 is a deficient number, since it is larger than the sum of its proper divisors (1).

421021103 is an equidigital number, since it uses as much as digits as its factorization.

421021103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 421021103 is about 20518.7987708833. The cubic root of 421021103 is about 749.4936451796.

Adding to 421021103 its reverse (301120124), we get a palindrome (722141227).

It can be divided in two parts, 421021 and 103, that added together give a palindrome (421124).

The spelling of 421021103 in words is "four hundred twenty-one million, twenty-one thousand, one hundred three".