21101212120010 has 48 divisors (see below), whose sum is σ = 41749642142208. Its totient is φ = 7673051818080.

The previous prime is 21101212120007. The next prime is 21101212120013. The reversal of 21101212120010 is 1002121210112.

It is an interprime number because it is at equal distance from previous prime (21101212120007) and next prime (21101212120013).

It is a super-2 number, since 2×21101212120010² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21101212120013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157096139 + ... + 157230401.

It is an arithmetic number, because the mean of its divisors is an integer number (869784211296).

Almost surely, 2^{21101212120010} is an apocalyptic number.

21101212120010 is a deficient number, since it is larger than the sum of its proper divisors (20648430022198).

21101212120010 is a wasteful number, since it uses less digits than its factorization.

21101212120010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264179 (or 264168 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21101212120010 its reverse (1002121210112), we get a palindrome (22103333330122).

The spelling of 21101212120010 in words is "twenty-one trillion, one hundred one billion, two hundred twelve million, one hundred twenty thousand, ten".