30121355423 has 16 divisors (see below), whose sum is σ = 30775864320. Its totient is φ = 29473567200.

The previous prime is 30121355393. The next prime is 30121355471. The reversal of 30121355423 is 32455312103.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 30121355423 - 2⁸ = 30121355167 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 (30121355023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6516053 + ... + 6520673.

It is an arithmetic number, because the mean of its divisors is an integer number (1923491520).

Almost surely, 2^30121355423 is an apocalyptic number.

30121355423 is a deficient number, since it is larger than the sum of its proper divisors (654508897).

30121355423 is a wasteful number, since it uses less digits than its factorization.

30121355423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5318.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 30121355423 its reverse (32455312103), we get a palindrome (62576667526).

The spelling of 30121355423 in words is "thirty billion, one hundred twenty-one million, three hundred fifty-five thousand, four hundred twenty-three".