30221312420 has 48 divisors (see below), whose sum is σ = 72367062768. Its totient is φ = 10502246400.

The previous prime is 30221312393. The next prime is 30221312431. The reversal of 30221312420 is 2421312203.

It can be written as a sum of positive squares in 8 ways, for example, as 2117472256 + 28103840164 = 46016^2 + 167642^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 30221312392 and 30221312401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3414281 + ... + 3423120.

It is an arithmetic number, because the mean of its divisors is an integer number (1507647141).

Almost surely, 2^30221312420 is an apocalyptic number.

It is an amenable number.

30221312420 is an abundant number, since it is smaller than the sum of its proper divisors (42145750348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30221312420 is a wasteful number, since it uses less digits than its factorization.

30221312420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6837440 (or 6837438 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 30221312420 its reverse (2421312203), we get a palindrome (32642624623).

The spelling of 30221312420 in words is "thirty billion, two hundred twenty-one million, three hundred twelve thousand, four hundred twenty".