30121123102 has 12 divisors (see below), whose sum is σ = 52558286400. Its totient is φ = 12909052716.

The previous prime is 30121123091. The next prime is 30121123103. The reversal of 30121123102 is 20132112103.

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 polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 153679102 + ... + 153679297.

It is an arithmetic number, because the mean of its divisors is an integer number (4379857200).

Almost surely, 2^30121123102 is an apocalyptic number.

30121123102 is a deficient number, since it is larger than the sum of its proper divisors (22437163298).

30121123102 is a wasteful number, since it uses less digits than its factorization.

30121123102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307358415 (or 307358408 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 30121123102 its reverse (20132112103), we get a palindrome (50253235205).

The spelling of 30121123102 in words is "thirty billion, one hundred twenty-one million, one hundred twenty-three thousand, one hundred two".