210101221200123 has 24 divisors (see below), whose sum is σ = 331505934020976. Its totient is φ = 127165864593600.

The previous prime is 210101221200107. The next prime is 210101221200161. The reversal of 210101221200123 is 321002122101012.

210101221200123 is a `hidden beast` number, since 21 + 0 + 101 + 221 + 200 + 123 = 666.

It is not a de Polignac number, because 210101221200123 - 2⁴ = 210101221200107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210101221200096 and 210101221200105.

It is not an unprimeable number, because it can be changed into a prime (210101221200103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1401665188 + ... + 1401815073.

It is an arithmetic number, because the mean of its divisors is an integer number (13812747250874).

Almost surely, 2^{210101221200123} is an apocalyptic number.

210101221200123 is a deficient number, since it is larger than the sum of its proper divisors (121404712820853).

210101221200123 is a wasteful number, since it uses less digits than its factorization.

210101221200123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803481035 (or 2803481032 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 210101221200123 its reverse (321002122101012), we get a palindrome (531103343301135).

The spelling of 210101221200123 in words is "two hundred ten trillion, one hundred one billion, two hundred twenty-one million, two hundred thousand, one hundred twenty-three".