21101101022204 has 24 divisors (see below), whose sum is σ = 42611932167168. Its totient is φ = 8955529697520.

The previous prime is 21101101022173. The next prime is 21101101022207. The reversal of 21101101022204 is 40222010110112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101101022207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3658301732 + ... + 3658307499.

It is an arithmetic number, because the mean of its divisors is an integer number (1775497173632).

Almost surely, 2^{21101101022204} is an apocalyptic number.

It is an amenable number.

21101101022204 is an abundant number, since it is smaller than the sum of its proper divisors (21510831144964).

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

21101101022204 is a wasteful number, since it uses less digits than its factorization.

21101101022204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7316609345 (or 7316609343 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21101101022204 its reverse (40222010110112), we get a palindrome (61323111132316).

The spelling of 21101101022204 in words is "twenty-one trillion, one hundred one billion, one hundred one million, twenty-two thousand, two hundred four".