30121311121 has 4 divisors (see below), whose sum is σ = 32859612144. Its totient is φ = 27383010100.

The previous prime is 30121311113. The next prime is 30121311137. The reversal of 30121311121 is 12111312103.

It is a happy number.

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 30121311121 - 2³ = 30121311113 is a prime.

It is a super-3 number, since 3×30121311121³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30121311095 and 30121311104.

It is not an unprimeable number, because it can be changed into a prime (30121311421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1369150495 + ... + 1369150516.

It is an arithmetic number, because the mean of its divisors is an integer number (8214903036).

Almost surely, 2^30121311121 is an apocalyptic number.

It is an amenable number.

30121311121 is a deficient number, since it is larger than the sum of its proper divisors (2738301023).

30121311121 is a wasteful number, since it uses less digits than its factorization.

30121311121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738301022.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 30121311121 its reverse (12111312103), we get a palindrome (42232623224).

The spelling of 30121311121 in words is "thirty billion, one hundred twenty-one million, three hundred eleven thousand, one hundred twenty-one".