30121668961 has 4 divisors (see below), whose sum is σ = 30159463572. Its totient is φ = 30083874352.

The previous prime is 30121668923. The next prime is 30121669001. The reversal of 30121668961 is 16986612103.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24205136400 + 5916532561 = 155580^2 + 76919^2 .

It is a cyclic number.

It is not a de Polignac number, because 30121668961 - 2¹⁷ = 30121537889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30121666961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18896110 + ... + 18897703.

It is an arithmetic number, because the mean of its divisors is an integer number (7539865893).

Almost surely, 2^30121668961 is an apocalyptic number.

It is an amenable number.

30121668961 is a deficient number, since it is larger than the sum of its proper divisors (37794611).

30121668961 is an equidigital number, since it uses as much as digits as its factorization.

30121668961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37794610.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 30121668961 in words is "thirty billion, one hundred twenty-one million, six hundred sixty-eight thousand, nine hundred sixty-one".