21100223210174 has 16 divisors (see below), whose sum is σ = 33026555049120. Its totient is φ = 10091374824960.

The previous prime is 21100223210173. The next prime is 21100223210267. The reversal of 21100223210174 is 47101232200112.

It is a happy number.

It is a super-2 number, since 2×21100223210174² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100223210173) 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 7 ways as a sum of consecutive naturals, for example, 15651854 + ... + 16946414.

It is an arithmetic number, because the mean of its divisors is an integer number (2064159690570).

Almost surely, 2^{21100223210174} is an apocalyptic number.

21100223210174 is a deficient number, since it is larger than the sum of its proper divisors (11926331838946).

21100223210174 is a wasteful number, since it uses less digits than its factorization.

21100223210174 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648915.

The product of its (nonzero) digits is 1344, while the sum is 26.

Adding to 21100223210174 its reverse (47101232200112), we get a palindrome (68201455410286).

The spelling of 21100223210174 in words is "twenty-one trillion, one hundred billion, two hundred twenty-three million, two hundred ten thousand, one hundred seventy-four".