30312401221 has 4 divisors (see below), whose sum is σ = 30313208844. Its totient is φ = 30311593600.

The previous prime is 30312401179. The next prime is 30312401237. The reversal of 30312401221 is 12210421303.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12210421303 = 4229 ⋅2887307.

It can be written as a sum of positive squares in 2 ways, for example, as 18120928996 + 12191472225 = 134614^2 + 110415^2 .

It is a cyclic number.

It is not a de Polignac number, because 30312401221 - 2³³ = 21722466629 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 (30312401261) 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, 344620 + ... + 423541.

It is an arithmetic number, because the mean of its divisors is an integer number (7578302211).

Almost surely, 2^30312401221 is an apocalyptic number.

It is an amenable number.

30312401221 is a deficient number, since it is larger than the sum of its proper divisors (807623).

30312401221 is an equidigital number, since it uses as much as digits as its factorization.

30312401221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807622.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 30312401221 its reverse (12210421303), we get a palindrome (42522822524).

The spelling of 30312401221 in words is "thirty billion, three hundred twelve million, four hundred one thousand, two hundred twenty-one".