21221300030 has 16 divisors (see below), whose sum is σ = 43655245920. Its totient is φ = 7275874272.

The previous prime is 21221300027. The next prime is 21221300041. The reversal of 21221300030 is 3000312212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 21221299978 and 21221300014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151580645 + ... + 151580784.

It is an arithmetic number, because the mean of its divisors is an integer number (2728452870).

Almost surely, 2^21221300030 is an apocalyptic number.

21221300030 is an abundant number, since it is smaller than the sum of its proper divisors (22433945890).

21221300030 is a wasteful number, since it uses less digits than its factorization.

21221300030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303161443.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21221300030 its reverse (3000312212), we get a palindrome (24221612242).

The spelling of 21221300030 in words is "twenty-one billion, two hundred twenty-one million, three hundred thousand, thirty".