30121909893 has 24 divisors (see below), whose sum is σ = 43609509216. Its totient is φ = 20035144800.

The previous prime is 30121909879. The next prime is 30121909907. The reversal of 30121909893 is 39890912103.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30121909879) and next prime (30121909907).

It is not a de Polignac number, because 30121909893 - 2⁸ = 30121909637 is a prime.

It is a super-2 number, since 2×30121909893² (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 (30121909823) 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 23 ways as a sum of consecutive naturals, for example, 9041238 + ... + 9044568.

It is an arithmetic number, because the mean of its divisors is an integer number (1817062884).

Almost surely, 2^30121909893 is an apocalyptic number.

It is an amenable number.

30121909893 is a deficient number, since it is larger than the sum of its proper divisors (13487599323).

30121909893 is a wasteful number, since it uses less digits than its factorization.

30121909893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5345 (or 5342 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The spelling of 30121909893 in words is "thirty billion, one hundred twenty-one million, nine hundred nine thousand, eight hundred ninety-three".