21103022130 has 32 divisors (see below), whose sum is σ = 51138981504. Its totient is φ = 5572836096.

The previous prime is 21103022111. The next prime is 21103022141. The reversal of 21103022130 is 3122030112.

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

It is a Curzon 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, 3411639 + ... + 3417818.

It is an arithmetic number, because the mean of its divisors is an integer number (1598093172).

Almost surely, 2^21103022130 is an apocalyptic number.

21103022130 is an abundant number, since it is smaller than the sum of its proper divisors (30035959374).

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

21103022130 is a wasteful number, since it uses less digits than its factorization.

21103022130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6829570.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21103022130 its reverse (3122030112), we get a palindrome (24225052242).

The spelling of 21103022130 in words is "twenty-one billion, one hundred three million, twenty-two thousand, one hundred thirty".