21121044430210 has 32 divisors (see below), whose sum is σ = 38037278799360. Its totient is φ = 8444107660032.

The previous prime is 21121044430193. The next prime is 21121044430219. The reversal of 21121044430210 is 1203444012112.

It is not an unprimeable number, because it can be changed into a prime (21121044430219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267556026 + ... + 267634954.

It is an arithmetic number, because the mean of its divisors is an integer number (1188664962480).

Almost surely, 2^{21121044430210} is an apocalyptic number.

21121044430210 is a deficient number, since it is larger than the sum of its proper divisors (16916234369150).

21121044430210 is a wasteful number, since it uses less digits than its factorization.

21121044430210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92250.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21121044430210 its reverse (1203444012112), we get a palindrome (22324488442322).

The spelling of 21121044430210 in words is "twenty-one trillion, one hundred twenty-one billion, forty-four million, four hundred thirty thousand, two hundred ten".