21223100231010 has 96 divisors (see below), whose sum is σ = 55616058546048. Its totient is φ = 5614798625280.

The previous prime is 21223100231009. The next prime is 21223100231051. The reversal of 21223100231010 is 1013200132212.

21223100231010 is a `hidden beast` number, since 2 + 122 + 310 + 0 + 231 + 0 + 1 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44482179 + ... + 44956761.

It is an arithmetic number, because the mean of its divisors is an integer number (579333943188).

Almost surely, 2^{21223100231010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21223100231010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27808029273024).

21223100231010 is an abundant number, since it is smaller than the sum of its proper divisors (34392958315038).

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

21223100231010 is a wasteful number, since it uses less digits than its factorization.

21223100231010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478520 (or 478517 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21223100231010 its reverse (1013200132212), we get a palindrome (22236300363222).

The spelling of 21223100231010 in words is "twenty-one trillion, two hundred twenty-three billion, one hundred million, two hundred thirty-one thousand, ten".