140021430021 has 18 divisors (see below), whose sum is σ = 222311344710. Its totient is φ = 84861472080.

The previous prime is 140021430011. The next prime is 140021430077. The reversal of 140021430021 is 120034120041.

140021430021 is a `hidden beast` number, since 1 + 400 + 214 + 30 + 0 + 21 = 666.

140021430021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 130383099396 + 9638330625 = 361086^2 + 98175^2 .

It is not a de Polignac number, because 140021430021 - 2⁷ = 140021429893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140021429976 and 140021430003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140021430011) 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 17 ways as a sum of consecutive naturals, for example, 64287906 + ... + 64290083.

Almost surely, 2^140021430021 is an apocalyptic number.

140021430021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

140021430021 is a deficient number, since it is larger than the sum of its proper divisors (82289914689).

140021430021 is a wasteful number, since it uses less digits than its factorization.

140021430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128578017 (or 128578003 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 140021430021 its reverse (120034120041), we get a palindrome (260055550062).

The spelling of 140021430021 in words is "one hundred forty billion, twenty-one million, four hundred thirty thousand, twenty-one".