420043401121 has 4 divisors (see below), whose sum is σ = 422862484500. Its totient is φ = 417224317744.

The previous prime is 420043401101. The next prime is 420043401139. The reversal of 420043401121 is 121104340024.

It is a happy number.

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 204022952721 + 216020448400 = 451689^2 + 464780^2 .

It is a cyclic number.

It is not a de Polignac number, because 420043401121 - 2⁷ = 420043400993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420043401092 and 420043401101.

It is not an unprimeable number, because it can be changed into a prime (420043401101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1409541466 + ... + 1409541763.

It is an arithmetic number, because the mean of its divisors is an integer number (105715621125).

Almost surely, 2^420043401121 is an apocalyptic number.

It is an amenable number.

420043401121 is a deficient number, since it is larger than the sum of its proper divisors (2819083379).

420043401121 is a wasteful number, since it uses less digits than its factorization.

420043401121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819083378.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 420043401121 its reverse (121104340024), we get a palindrome (541147741145).

The spelling of 420043401121 in words is "four hundred twenty billion, forty-three million, four hundred one thousand, one hundred twenty-one".