420144032101 has 4 divisors (see below), whose sum is σ = 420172908652. Its totient is φ = 420115155552.

The previous prime is 420144032071. The next prime is 420144032129. The reversal of 420144032101 is 101230441024.

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 259824672900 + 160319359201 = 509730^2 + 400399^2 .

It is a cyclic number.

It is not a de Polignac number, because 420144032101 - 2⁵ = 420144032069 is a prime.

It is a super-2 number, since 2×420144032101² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420144032141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14416440 + ... + 14445553.

It is an arithmetic number, because the mean of its divisors is an integer number (105043227163).

Almost surely, 2^420144032101 is an apocalyptic number.

It is an amenable number.

420144032101 is a deficient number, since it is larger than the sum of its proper divisors (28876551).

420144032101 is a wasteful number, since it uses less digits than its factorization.

420144032101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28876550.

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

Adding to 420144032101 its reverse (101230441024), we get a palindrome (521374473125).

The spelling of 420144032101 in words is "four hundred twenty billion, one hundred forty-four million, thirty-two thousand, one hundred one".