30121080993 has 12 divisors (see below), whose sum is σ = 44221478548. Its totient is φ = 19751528160.

The previous prime is 30121080973. The next prime is 30121081021. The reversal of 30121080993 is 39908012103.

It can be written as a sum of positive squares in 2 ways, for example, as 8196948369 + 21924132624 = 90537^2 + 148068^2 .

It is not a de Polignac number, because 30121080993 - 2⁶ = 30121080929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30121080923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27432130 + ... + 27433227.

Almost surely, 2^30121080993 is an apocalyptic number.

It is an amenable number.

30121080993 is a deficient number, since it is larger than the sum of its proper divisors (14100397555).

30121080993 is a wasteful number, since it uses less digits than its factorization.

30121080993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54865424 (or 54865421 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The spelling of 30121080993 in words is "thirty billion, one hundred twenty-one million, eighty thousand, nine hundred ninety-three".