30220123121 has 4 divisors (see below), whose sum is σ = 30863104512. Its totient is φ = 29577141732.

The previous prime is 30220123091. The next prime is 30220123139. The reversal of 30220123121 is 12132102203.

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 30220123121 - 2¹⁴ = 30220106737 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 30220123121.

It is not an unprimeable number, because it can be changed into a prime (30220123621) 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, 321490625 + ... + 321490718.

It is an arithmetic number, because the mean of its divisors is an integer number (7715776128).

Almost surely, 2^30220123121 is an apocalyptic number.

It is an amenable number.

30220123121 is a deficient number, since it is larger than the sum of its proper divisors (642981391).

30220123121 is an equidigital number, since it uses as much as digits as its factorization.

30220123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642981390.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 30220123121 its reverse (12132102203), we get a palindrome (42352225324).

The spelling of 30220123121 in words is "thirty billion, two hundred twenty million, one hundred twenty-three thousand, one hundred twenty-one".