30121123100 has 36 divisors (see below), whose sum is σ = 65387278488. Its totient is φ = 12043944000.

The previous prime is 30121123091. The next prime is 30121123103. The reversal of 30121123100 is 132112103.

It is a super-2 number, since 2×30121123100² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121123103) 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 11 ways as a sum of consecutive naturals, for example, 219155 + ... + 329045.

Almost surely, 2^30121123100 is an apocalyptic number.

It is an amenable number.

30121123100 is an abundant number, since it is smaller than the sum of its proper divisors (35266155388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30121123100 is a wasteful number, since it uses less digits than its factorization.

30121123100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112646 (or 112639 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 30121123100 its reverse (132112103), we get a palindrome (30253235203).

The spelling of 30121123100 in words is "thirty billion, one hundred twenty-one million, one hundred twenty-three thousand, one hundred".