30431443132421 has 4 divisors (see below), whose sum is σ = 30435206148192. Its totient is φ = 30427680116652.

The previous prime is 30431443132393. The next prime is 30431443132439. The reversal of 30431443132421 is 12423134413403.

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 a de Polignac number, because none of the positive numbers 2^k-30431443132421 is a prime.

It is a super-2 number, since 2×30431443132421² (a number of 28 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 (30431443132451) 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, 1881495755 + ... + 1881511928.

It is an arithmetic number, because the mean of its divisors is an integer number (7608801537048).

Almost surely, 2^{30431443132421} is an apocalyptic number.

It is an amenable number.

30431443132421 is a deficient number, since it is larger than the sum of its proper divisors (3763015771).

30431443132421 is an equidigital number, since it uses as much as digits as its factorization.

30431443132421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3763015770.

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 30431443132421 its reverse (12423134413403), we get a palindrome (42854577545824).

The spelling of 30431443132421 in words is "thirty trillion, four hundred thirty-one billion, four hundred forty-three million, one hundred thirty-two thousand, four hundred twenty-one".