30021661522123 has 4 divisors (see below), whose sum is σ = 30021672669120. Its totient is φ = 30021650375128.

The previous prime is 30021661522093. The next prime is 30021661522133. The reversal of 30021661522123 is 32122516612003.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30021661522123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30021661522133) 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, 1255413 + ... + 7849801.

It is an arithmetic number, because the mean of its divisors is an integer number (7505418167280).

Almost surely, 2^{30021661522123} is an apocalyptic number.

30021661522123 is a deficient number, since it is larger than the sum of its proper divisors (11146997).

30021661522123 is an equidigital number, since it uses as much as digits as its factorization.

30021661522123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11146996.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 30021661522123 in words is "thirty trillion, twenty-one billion, six hundred sixty-one million, five hundred twenty-two thousand, one hundred twenty-three".