21201123110330 has 64 divisors (see below), whose sum is σ = 38709981243648. Its totient is φ = 8359674286080.

The previous prime is 21201123110327. The next prime is 21201123110357. The reversal of 21201123110330 is 3301132110212.

It is a happy number.

It is a super-2 number, since 2×21201123110330² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 171103979 + ... + 171227841.

It is an arithmetic number, because the mean of its divisors is an integer number (604843456932).

Almost surely, 2^{21201123110330} is an apocalyptic number.

21201123110330 is a deficient number, since it is larger than the sum of its proper divisors (17508858133318).

21201123110330 is a wasteful number, since it uses less digits than its factorization.

21201123110330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124871.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21201123110330 its reverse (3301132110212), we get a palindrome (24502255220542).

The spelling of 21201123110330 in words is "twenty-one trillion, two hundred one billion, one hundred twenty-three million, one hundred ten thousand, three hundred thirty".