21003104400222 has 48 divisors (see below), whose sum is σ = 50549343474960. Its totient is φ = 5793959832192.

The previous prime is 21003104400197. The next prime is 21003104400227. The reversal of 21003104400222 is 22200440130012.

It is a super-2 number, since 2×21003104400222² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003104400227) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1231700623 + ... + 1231717674.

It is an arithmetic number, because the mean of its divisors is an integer number (1053111322395).

Almost surely, 2^{21003104400222} is an apocalyptic number.

21003104400222 is an abundant number, since it is smaller than the sum of its proper divisors (29546239074738).

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

21003104400222 is a wasteful number, since it uses less digits than its factorization.

21003104400222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2463418345 (or 2463418338 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21003104400222 its reverse (22200440130012), we get a palindrome (43203544530234).

The spelling of 21003104400222 in words is "twenty-one trillion, three billion, one hundred four million, four hundred thousand, two hundred twenty-two".