30121123092 has 96 divisors (see below), whose sum is σ = 76503060480. Its totient is φ = 9188847360.

The previous prime is 30121123091. The next prime is 30121123103. The reversal of 30121123092 is 29032112103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121123091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4357503 + ... + 4364409.

It is an arithmetic number, because the mean of its divisors is an integer number (796906880).

Almost surely, 2^30121123092 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30121123092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38251530240).

30121123092 is an abundant number, since it is smaller than the sum of its proper divisors (46381937388).

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

30121123092 is a wasteful number, since it uses less digits than its factorization.

30121123092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7581 (or 7579 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 30121123092 its reverse (29032112103), we get a palindrome (59153235195).

The spelling of 30121123092 in words is "thirty billion, one hundred twenty-one million, one hundred twenty-three thousand, ninety-two".