420132121 has 4 divisors (see below), whose sum is σ = 420211044. Its totient is φ = 420053200.

The previous prime is 420132103. The next prime is 420132131. The reversal of 420132121 is 121231024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 157854096 + 262278025 = 12564^2 + 16195^2 .

It is a cyclic number.

It is not a de Polignac number, because 420132121 - 2⁹ = 420131609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420132095 and 420132104.

It is not an unprimeable number, because it can be changed into a prime (420132131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30850 + ... + 42331.

It is an arithmetic number, because the mean of its divisors is an integer number (105052761).

Almost surely, 2^420132121 is an apocalyptic number.

It is an amenable number.

420132121 is a deficient number, since it is larger than the sum of its proper divisors (78923).

420132121 is an equidigital number, since it uses as much as digits as its factorization.

420132121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78922.

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

The square root of 420132121 is about 20497.1247007965. The cubic root of 420132121 is about 748.9657572597.

Adding to 420132121 its reverse (121231024), we get a palindrome (541363145).

The spelling of 420132121 in words is "four hundred twenty million, one hundred thirty-two thousand, one hundred twenty-one".