420140234021 has 8 divisors (see below), whose sum is σ = 455704472664. Its totient is φ = 385781562880.

The previous prime is 420140234011. The next prime is 420140234023. The reversal of 420140234021 is 120432041024.

It can be written as a sum of positive squares in 4 ways, for example, as 146470005796 + 273670228225 = 382714^2 + 523135^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420140234021 - 2⁶ = 420140233957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420140234023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301391150 + ... + 301392543.

It is an arithmetic number, because the mean of its divisors is an integer number (56963059083).

Almost surely, 2^420140234021 is an apocalyptic number.

420140234021 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

420140234021 is a deficient number, since it is larger than the sum of its proper divisors (35564238643).

420140234021 is a wasteful number, since it uses less digits than its factorization.

420140234021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602783751.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 420140234021 its reverse (120432041024), we get a palindrome (540572275045).

The spelling of 420140234021 in words is "four hundred twenty billion, one hundred forty million, two hundred thirty-four thousand, twenty-one".