21002220030 has 32 divisors (see below), whose sum is σ = 54987631488. Its totient is φ = 5091447200.

The previous prime is 21002220017. The next prime is 21002220097. The reversal of 21002220030 is 3002220012.

It is a junction number, because it is equal to n+sod(n) for n = 21002219988 and 21002220015.

It is a congruent number.

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, 31821216 + ... + 31821875.

It is an arithmetic number, because the mean of its divisors is an integer number (1718363484).

Almost surely, 2^21002220030 is an apocalyptic number.

21002220030 is an abundant number, since it is smaller than the sum of its proper divisors (33985411458).

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

21002220030 is a wasteful number, since it uses less digits than its factorization.

21002220030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63643112.

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 21002220030 its reverse (3002220012), we get a palindrome (24004440042).

The spelling of 21002220030 in words is "twenty-one billion, two million, two hundred twenty thousand, thirty".