420212131 has 2 divisors, whose sum is σ = 420212132. Its totient is φ = 420212130.

The previous prime is 420212123. The next prime is 420212159. The reversal of 420212131 is 131212024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420212131 - 2³ = 420212123 is a prime.

It is a super-2 number, since 2×420212131² = 353156470079122322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420212831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210106065 + 210106066.

It is an arithmetic number, because the mean of its divisors is an integer number (210106066).

Almost surely, 2^420212131 is an apocalyptic number.

420212131 is a deficient number, since it is larger than the sum of its proper divisors (1).

420212131 is an equidigital number, since it uses as much as digits as its factorization.

420212131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 420212131 is about 20499.0763450454. The cubic root of 420212131 is about 749.0132986112.

Adding to 420212131 its reverse (131212024), we get a palindrome (551424155).

The spelling of 420212131 in words is "four hundred twenty million, two hundred twelve thousand, one hundred thirty-one".