21201303030 has 32 divisors (see below), whose sum is σ = 52258349664. Its totient is φ = 5500878336.

The previous prime is 21201303029. The next prime is 21201303043. The reversal of 21201303030 is 3030310212.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 9549027 + ... + 9551246.

It is an arithmetic number, because the mean of its divisors is an integer number (1633073427).

Almost surely, 2^21201303030 is an apocalyptic number.

21201303030 is an abundant number, since it is smaller than the sum of its proper divisors (31057046634).

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

21201303030 is a wasteful number, since it uses less digits than its factorization.

21201303030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19100320.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21201303030 its reverse (3030310212), we get a palindrome (24231613242).

The spelling of 21201303030 in words is "twenty-one billion, two hundred one million, three hundred three thousand, thirty".