30521231022145 has 4 divisors (see below), whose sum is σ = 36625477226580. Its totient is φ = 24416984817712.

The previous prime is 30521231022137. The next prime is 30521231022151. The reversal of 30521231022145 is 54122013212503.

It is a happy number.

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 20374381412401 + 10146849609744 = 4513799^2 + 3185412^2 .

It is a cyclic number.

It is not a de Polignac number, because 30521231022145 - 2³ = 30521231022137 is a prime.

It is an unprimeable number.

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, 3052123102210 + ... + 3052123102219.

It is an arithmetic number, because the mean of its divisors is an integer number (9156369306645).

Almost surely, 2^{30521231022145} is an apocalyptic number.

It is an amenable number.

30521231022145 is a deficient number, since it is larger than the sum of its proper divisors (6104246204435).

30521231022145 is an equidigital number, since it uses as much as digits as its factorization.

30521231022145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6104246204434.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 30521231022145 its reverse (54122013212503), we get a palindrome (84643244234648).

The spelling of 30521231022145 in words is "thirty trillion, five hundred twenty-one billion, two hundred thirty-one million, twenty-two thousand, one hundred forty-five".