21210230100122 has 48 divisors (see below), whose sum is σ = 37481308220160. Its totient is φ = 8974281187872.

The previous prime is 21210230100097. The next prime is 21210230100127. The reversal of 21210230100122 is 22100103201212.

It is a super-2 number, since 2×21210230100122² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21210230100122.

It is not an unprimeable number, because it can be changed into a prime (21210230100127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97541243 + ... + 97758449.

It is an arithmetic number, because the mean of its divisors is an integer number (780860587920).

Almost surely, 2^{21210230100122} is an apocalyptic number.

21210230100122 is a deficient number, since it is larger than the sum of its proper divisors (16271078120038).

21210230100122 is a wasteful number, since it uses less digits than its factorization.

21210230100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229915 (or 229908 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21210230100122 its reverse (22100103201212), we get a palindrome (43310333301334).

The spelling of 21210230100122 in words is "twenty-one trillion, two hundred ten billion, two hundred thirty million, one hundred thousand, one hundred twenty-two".