30421402421 has 4 divisors (see below), whose sum is σ = 30432399552. Its totient is φ = 30410405292.

The previous prime is 30421402411. The next prime is 30421402423. The reversal of 30421402421 is 12420412403.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30421402421 - 2²² = 30417208117 is a prime.

It is a super-2 number, since 2×30421402421² (a number of 22 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 (30421402423) 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, 5494415 + ... + 5499948.

It is an arithmetic number, because the mean of its divisors is an integer number (7608099888).

Almost surely, 2^30421402421 is an apocalyptic number.

It is an amenable number.

30421402421 is a deficient number, since it is larger than the sum of its proper divisors (10997131).

30421402421 is a wasteful number, since it uses less digits than its factorization.

30421402421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10997130.

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

Adding to 30421402421 its reverse (12420412403), we get a palindrome (42841814824).

The spelling of 30421402421 in words is "thirty billion, four hundred twenty-one million, four hundred two thousand, four hundred twenty-one".