10420612421 has 4 divisors (see below), whose sum is σ = 10429843500. Its totient is φ = 10411381344.

The previous prime is 10420612393. The next prime is 10420612457. The reversal of 10420612421 is 12421602401.

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 3362260225 + 7058352196 = 57985^2 + 84014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10420612421 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 (10420612121) 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 3 ways as a sum of consecutive naturals, for example, 4613846 + ... + 4616103.

It is an arithmetic number, because the mean of its divisors is an integer number (2607460875).

Almost surely, 2^10420612421 is an apocalyptic number.

It is an amenable number.

10420612421 is a deficient number, since it is larger than the sum of its proper divisors (9231079).

10420612421 is an equidigital number, since it uses as much as digits as its factorization.

10420612421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9231078.

The product of its (nonzero) digits is 768, while the sum is 23.

The spelling of 10420612421 in words is "ten billion, four hundred twenty million, six hundred twelve thousand, four hundred twenty-one".