30121841892 has 12 divisors (see below), whose sum is σ = 70284297776. Its totient is φ = 10040613960.

The previous prime is 30121841879. The next prime is 30121841899. The reversal of 30121841892 is 29814812103.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×30121841892² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30121841892.

It is not an unprimeable number, because it can be changed into a prime (30121841899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1255076734 + ... + 1255076757.

Almost surely, 2^30121841892 is an apocalyptic number.

It is an amenable number.

30121841892 is an abundant number, since it is smaller than the sum of its proper divisors (40162455884).

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

30121841892 is a wasteful number, since it uses less digits than its factorization.

30121841892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510153498 (or 2510153496 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The spelling of 30121841892 in words is "thirty billion, one hundred twenty-one million, eight hundred forty-one thousand, eight hundred ninety-two".