21101303030 has 16 divisors (see below), whose sum is σ = 37987868160. Its totient is φ = 8439293952.

The previous prime is 21101303017. The next prime is 21101303053. The reversal of 21101303030 is 3030310112.

It is a junction number, because it is equal to n+sod(n) for n = 21101302996 and 21101303014.

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, 79499 + ... + 220278.

It is an arithmetic number, because the mean of its divisors is an integer number (2374241760).

Almost surely, 2^21101303030 is an apocalyptic number.

21101303030 is a deficient number, since it is larger than the sum of its proper divisors (16886565130).

21101303030 is a wasteful number, since it uses less digits than its factorization.

21101303030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306823.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 21101303030 its reverse (3030310112), we get a palindrome (24131613142).

The spelling of 21101303030 in words is "twenty-one billion, one hundred one million, three hundred three thousand, thirty".