30531021021321 has 32 divisors (see below), whose sum is σ = 41628661186560. Its totient is φ = 19894849660224.

The previous prime is 30531021021287. The next prime is 30531021021353. The reversal of 30531021021321 is 12312012013503.

It is a happy number.

It is not a de Polignac number, because 30531021021321 - 2³⁸ = 30256143114377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30531021021291 and 30531021021300.

It is not an unprimeable number, because it can be changed into a prime (30531021021121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 348551496 + ... + 348639078.

It is an arithmetic number, because the mean of its divisors is an integer number (1300895662080).

Almost surely, 2^{30531021021321} is an apocalyptic number.

It is an amenable number.

30531021021321 is a deficient number, since it is larger than the sum of its proper divisors (11097640165239).

30531021021321 is a wasteful number, since it uses less digits than its factorization.

30531021021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90845.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 30531021021321 its reverse (12312012013503), we get a palindrome (42843033034824).

The spelling of 30531021021321 in words is "thirty trillion, five hundred thirty-one billion, twenty-one million, twenty-one thousand, three hundred twenty-one".