21301130 has 16 divisors (see below), whose sum is σ = 38430720. Its totient is φ = 8500752.

The previous prime is 21301097. The next prime is 21301157. The reversal of 21301130 is 3110312.

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, 2567 + ... + 7013.

It is an arithmetic number, because the mean of its divisors is an integer number (2401920).

Almost surely, 2^21301130 is an apocalyptic number.

21301130 is a deficient number, since it is larger than the sum of its proper divisors (17129590).

21301130 is a wasteful number, since it uses less digits than its factorization.

21301130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4933.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 21301130 is about 4615.3147238298. The cubic root of 21301130 is about 277.2048860597.

Adding to 21301130 its reverse (3110312), we get a palindrome (24411442).

The spelling of 21301130 in words is "twenty-one million, three hundred one thousand, one hundred thirty".