21121110010312 has 16 divisors (see below), whose sum is σ = 42648395213340. Its totient is φ = 9748204620096.

The previous prime is 21121110010229. The next prime is 21121110010321. The reversal of 21121110010312 is 21301001112112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20441484543076 + 679625467236 = 4521226^2 + 824394^2 .

It is a super-2 number, since 2×21121110010312² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 101543798023 + ... + 101543798230.

Almost surely, 2^{21121110010312} is an apocalyptic number.

It is an amenable number.

21121110010312 is an abundant number, since it is smaller than the sum of its proper divisors (21527285203028).

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

21121110010312 is a wasteful number, since it uses less digits than its factorization.

21121110010312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203087596272 (or 203087596268 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 21121110010312 its reverse (21301001112112), we get a palindrome (42422111122424).

The spelling of 21121110010312 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred ten million, ten thousand, three hundred twelve".