30121212224021 has 12 divisors (see below), whose sum is σ = 32498731154400. Its totient is φ = 27839888033760.

The previous prime is 30121212224011. The next prime is 30121212224027. The reversal of 30121212224021 is 12042221212103.

It is a de Polignac number, because none of the positive numbers 2^k-30121212224021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121212224027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 471510881 + ... + 471574758.

It is an arithmetic number, because the mean of its divisors is an integer number (2708227596200).

Almost surely, 2^{30121212224021} is an apocalyptic number.

It is an amenable number.

30121212224021 is a deficient number, since it is larger than the sum of its proper divisors (2377518930379).

30121212224021 is an equidigital number, since it uses as much as digits as its factorization.

30121212224021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943085740 (or 943085699 counting only the distinct ones).

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

Adding to 30121212224021 its reverse (12042221212103), we get a palindrome (42163433436124).

The spelling of 30121212224021 in words is "thirty trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty-four thousand, twenty-one".