421109131 has 2 divisors, whose sum is σ = 421109132. Its totient is φ = 421109130.

The previous prime is 421109113. The next prime is 421109153. The reversal of 421109131 is 131901124.

Together with previous prime (421109113) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (421109153) can be obtained adding 421109131 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421109131 - 2¹¹ = 421107083 is a prime.

It is a super-2 number, since 2×421109131² = 354665800423150322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421103131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210554565 + 210554566.

It is an arithmetic number, because the mean of its divisors is an integer number (210554566).

Almost surely, 2^421109131 is an apocalyptic number.

421109131 is a deficient number, since it is larger than the sum of its proper divisors (1).

421109131 is an equidigital number, since it uses as much as digits as its factorization.

421109131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 421109131 is about 20520.9437161160. The cubic root of 421109131 is about 749.5458767887.

The spelling of 421109131 in words is "four hundred twenty-one million, one hundred nine thousand, one hundred thirty-one".