30231131212021 has 4 divisors (see below), whose sum is σ = 30656921792544. Its totient is φ = 29805340631500.

The previous prime is 30231131211887. The next prime is 30231131212057. The reversal of 30231131212021 is 12021213113203.

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 30231131212021 - 2¹⁹ = 30231130687733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30231131211983 and 30231131212001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30231131212091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212895290155 + ... + 212895290296.

It is an arithmetic number, because the mean of its divisors is an integer number (7664230448136).

Almost surely, 2^{30231131212021} is an apocalyptic number.

It is an amenable number.

30231131212021 is a deficient number, since it is larger than the sum of its proper divisors (425790580523).

30231131212021 is an equidigital number, since it uses as much as digits as its factorization.

30231131212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425790580522.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 30231131212021 its reverse (12021213113203), we get a palindrome (42252344325224).

The spelling of 30231131212021 in words is "thirty trillion, two hundred thirty-one billion, one hundred thirty-one million, two hundred twelve thousand, twenty-one".