30561541021221 has 64 divisors (see below), whose sum is σ = 48911080808448. Its totient is φ = 16612946108928.

The previous prime is 30561541021211. The next prime is 30561541021229. The reversal of 30561541021221 is 12212014516503.

It is not a de Polignac number, because 30561541021221 - 2¹¹ = 30561541019173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30561541021229) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2867241 + ... + 8327313.

It is an arithmetic number, because the mean of its divisors is an integer number (764235637632).

Almost surely, 2^{30561541021221} is an apocalyptic number.

It is an amenable number.

30561541021221 is a deficient number, since it is larger than the sum of its proper divisors (18349539787227).

30561541021221 is a wasteful number, since it uses less digits than its factorization.

30561541021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5460290.

The product of its (nonzero) digits is 14400, while the sum is 33.

Adding to 30561541021221 its reverse (12212014516503), we get a palindrome (42773555537724).

The spelling of 30561541021221 in words is "thirty trillion, five hundred sixty-one billion, five hundred forty-one million, twenty-one thousand, two hundred twenty-one".