30320515213221 has 4 divisors (see below), whose sum is σ = 40427353617632. Its totient is φ = 20213676808812.

The previous prime is 30320515213213. The next prime is 30320515213229. The reversal of 30320515213221 is 12231251502303.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (30320515213213) and next prime (30320515213229).

It is not a de Polignac number, because 30320515213221 - 2³ = 30320515213213 is a prime.

It is a super-2 number, since 2×30320515213221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30320515213229) 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, 5053419202201 + ... + 5053419202206.

It is an arithmetic number, because the mean of its divisors is an integer number (10106838404408).

Almost surely, 2^{30320515213221} is an apocalyptic number.

It is an amenable number.

30320515213221 is a deficient number, since it is larger than the sum of its proper divisors (10106838404411).

30320515213221 is a wasteful number, since it uses less digits than its factorization.

30320515213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10106838404410.

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 30320515213221 its reverse (12231251502303), we get a palindrome (42551766715524).

The spelling of 30320515213221 in words is "thirty trillion, three hundred twenty billion, five hundred fifteen million, two hundred thirteen thousand, two hundred twenty-one".