30129281811 has 12 divisors (see below), whose sum is σ = 43926804792. Its totient is φ = 19898465856.

The previous prime is 30129281807. The next prime is 30129281813. The reversal of 30129281811 is 11818292103.

It is a happy number.

It is not a de Polignac number, because 30129281811 - 2² = 30129281807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30129281813) 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 11 ways as a sum of consecutive naturals, for example, 15642486 + ... + 15644411.

It is an arithmetic number, because the mean of its divisors is an integer number (3660567066).

Almost surely, 2^30129281811 is an apocalyptic number.

30129281811 is a deficient number, since it is larger than the sum of its proper divisors (13797522981).

30129281811 is a wasteful number, since it uses less digits than its factorization.

30129281811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31287010 (or 31287007 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The spelling of 30129281811 in words is "thirty billion, one hundred twenty-nine million, two hundred eighty-one thousand, eight hundred eleven".