21341321023412 has 48 divisors (see below), whose sum is σ = 40980040894800. Its totient is φ = 9663761522688.

The previous prime is 21341321023349. The next prime is 21341321023481. The reversal of 21341321023412 is 21432012314312.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 289870252816 + 21051450770596 = 538396^2 + 4588186^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171562214 + ... + 171686562.

It is an arithmetic number, because the mean of its divisors is an integer number (853750851975).

Almost surely, 2^{21341321023412} is an apocalyptic number.

It is an amenable number.

21341321023412 is a deficient number, since it is larger than the sum of its proper divisors (19638719871388).

21341321023412 is a wasteful number, since it uses less digits than its factorization.

21341321023412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186692 (or 186690 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 21341321023412 its reverse (21432012314312), we get a palindrome (42773333337724).

The spelling of 21341321023412 in words is "twenty-one trillion, three hundred forty-one billion, three hundred twenty-one million, twenty-three thousand, four hundred twelve".