21041133212423 has 16 divisors (see below), whose sum is σ = 22284966862080. Its totient is φ = 19826818023936.

The previous prime is 21041133212389. The next prime is 21041133212441. The reversal of 21041133212423 is 32421233114012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21041133212423 - 2³² = 21036838245127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041133202423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23441690 + ... + 24322727.

It is an arithmetic number, because the mean of its divisors is an integer number (1392810428880).

Almost surely, 2^{21041133212423} is an apocalyptic number.

21041133212423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21041133212423 is a deficient number, since it is larger than the sum of its proper divisors (1243833649657).

21041133212423 is a wasteful number, since it uses less digits than its factorization.

21041133212423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47764726.

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

Adding to 21041133212423 its reverse (32421233114012), we get a palindrome (53462366326435).

The spelling of 21041133212423 in words is "twenty-one trillion, forty-one billion, one hundred thirty-three million, two hundred twelve thousand, four hundred twenty-three".