30111022121 has 4 divisors (see below), whose sum is σ = 30111376644. Its totient is φ = 30110667600.

The previous prime is 30111022091. The next prime is 30111022159. The reversal of 30111022121 is 12122011103.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 21561985600 + 8549036521 = 146840^2 + 92461^2 .

It is a cyclic number.

It is not a de Polignac number, because 30111022121 - 2³⁴ = 12931152937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30111022096 and 30111022105.

It is not an unprimeable number, because it can be changed into a prime (30111022181) 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, 34331 + ... + 247791.

It is an arithmetic number, because the mean of its divisors is an integer number (7527844161).

Almost surely, 2^30111022121 is an apocalyptic number.

It is an amenable number.

30111022121 is a deficient number, since it is larger than the sum of its proper divisors (354523).

30111022121 is a wasteful number, since it uses less digits than its factorization.

30111022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354522.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 30111022121 its reverse (12122011103), we get a palindrome (42233033224).

The spelling of 30111022121 in words is "thirty billion, one hundred eleven million, twenty-two thousand, one hundred twenty-one".