30121197568 has 272 divisors, whose sum is σ = 77308821504. Its totient is φ = 11395399680.

The previous prime is 30121197559. The next prime is 30121197583. The reversal of 30121197568 is 86579112103.

It is a super-2 number, since 2×30121197568² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237174721 + ... + 237174847.

Almost surely, 2^30121197568 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 30121197568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38654410752).

30121197568 is an abundant number, since it is smaller than the sum of its proper divisors (47187623936).

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

30121197568 is an equidigital number, since it uses as much as digits as its factorization.

30121197568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 30121197568 in words is "thirty billion, one hundred twenty-one million, one hundred ninety-seven thousand, five hundred sixty-eight".