30142120121 has 4 divisors (see below), whose sum is σ = 30142526592. Its totient is φ = 30141713652.

The previous prime is 30142120111. The next prime is 30142120159. The reversal of 30142120121 is 12102124103.

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 30142120121 - 2¹⁰ = 30142119097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30142120121.

It is not an unprimeable number, because it can be changed into a prime (30142120111) 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, 56861 + ... + 252026.

It is an arithmetic number, because the mean of its divisors is an integer number (7535631648).

Almost surely, 2^30142120121 is an apocalyptic number.

It is an amenable number.

30142120121 is a deficient number, since it is larger than the sum of its proper divisors (406471).

30142120121 is an equidigital number, since it uses as much as digits as its factorization.

30142120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406470.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 30142120121 its reverse (12102124103), we get a palindrome (42244244224).

The spelling of 30142120121 in words is "thirty billion, one hundred forty-two million, one hundred twenty thousand, one hundred twenty-one".