21121010330 has 16 divisors (see below), whose sum is σ = 43448935680. Its totient is φ = 7241489232.

The previous prime is 21121010321. The next prime is 21121010371. The reversal of 21121010330 is 3301012112.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150864290 + ... + 150864429.

It is an arithmetic number, because the mean of its divisors is an integer number (2715558480).

Almost surely, 2^21121010330 is an apocalyptic number.

21121010330 is an abundant number, since it is smaller than the sum of its proper divisors (22327925350).

21121010330 is a wasteful number, since it uses less digits than its factorization.

21121010330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301728733.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21121010330 its reverse (3301012112), we get a palindrome (24422022442).

The spelling of 21121010330 in words is "twenty-one billion, one hundred twenty-one million, ten thousand, three hundred thirty".