21342234023412 has 12 divisors (see below), whose sum is σ = 49798546054656. Its totient is φ = 7114078007800.

The previous prime is 21342234023399. The next prime is 21342234023419. The reversal of 21342234023412 is 21432043224312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×21342234023412² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342234023419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889259750964 + ... + 889259750987.

It is an arithmetic number, because the mean of its divisors is an integer number (4149878837888).

Almost surely, 2^{21342234023412} is an apocalyptic number.

It is an amenable number.

21342234023412 is an abundant number, since it is smaller than the sum of its proper divisors (28456312031244).

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

21342234023412 is a wasteful number, since it uses less digits than its factorization.

21342234023412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778519501958 (or 1778519501956 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 21342234023412 its reverse (21432043224312), we get a palindrome (42774277247724).

The spelling of 21342234023412 in words is "twenty-one trillion, three hundred forty-two billion, two hundred thirty-four million, twenty-three thousand, four hundred twelve".