21432100123412 has 24 divisors (see below), whose sum is σ = 40975733608992. Its totient is φ = 9727600335200.

The previous prime is 21432100123403. The next prime is 21432100123417.

It is a happy number.

21432100123412 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432100123417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356553539 + ... + 356613642.

It is an arithmetic number, because the mean of its divisors is an integer number (1707322233708).

Almost surely, 2^{21432100123412} is an apocalyptic number.

21432100123412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21432100123412 is a deficient number, since it is larger than the sum of its proper divisors (19543633485580).

21432100123412 is a wasteful number, since it uses less digits than its factorization.

21432100123412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713167879 (or 713167877 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

It can be divided in two parts, 21432100 and 123412, that added together give a palindrome (21555512).

The spelling of 21432100123412 in words is "twenty-one trillion, four hundred thirty-two billion, one hundred million, one hundred twenty-three thousand, four hundred twelve".