30051232121 has 4 divisors (see below), whose sum is σ = 30784189044. Its totient is φ = 29318275200.

The previous prime is 30051232063. The next prime is 30051232139. The reversal of 30051232121 is 12123215003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12123215003 = 108457 ⋅111779.

It can be written as a sum of positive squares in 2 ways, for example, as 11708322025 + 18342910096 = 108205^2 + 135436^2 .

It is a cyclic number.

It is not a de Polignac number, because 30051232121 - 2¹⁰ = 30051231097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30051232093 and 30051232102.

It is not an unprimeable number, because it can be changed into a prime (30051232621) 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, 366478400 + ... + 366478481.

It is an arithmetic number, because the mean of its divisors is an integer number (7696047261).

Almost surely, 2^30051232121 is an apocalyptic number.

It is an amenable number.

30051232121 is a deficient number, since it is larger than the sum of its proper divisors (732956923).

30051232121 is an equidigital number, since it uses as much as digits as its factorization.

30051232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732956922.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 30051232121 its reverse (12123215003), we get a palindrome (42174447124).

The spelling of 30051232121 in words is "thirty billion, fifty-one million, two hundred thirty-two thousand, one hundred twenty-one".