21101423044343 has 16 divisors (see below), whose sum is σ = 23314774988736. Its totient is φ = 18996130982400.

The previous prime is 21101423044313. The next prime is 21101423044349. The reversal of 21101423044343 is 34344032410112.

It is a cyclic number.

It is not a de Polignac number, because 21101423044343 - 2¹⁸ = 21101422782199 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 (21101423044349) 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, 13150493 + ... + 14667593.

It is an arithmetic number, because the mean of its divisors is an integer number (1457173436796).

Almost surely, 2^{21101423044343} is an apocalyptic number.

21101423044343 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21101423044343 is a deficient number, since it is larger than the sum of its proper divisors (2213351944393).

21101423044343 is a wasteful number, since it uses less digits than its factorization.

21101423044343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552714.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 21101423044343 its reverse (34344032410112), we get a palindrome (55445455454455).

The spelling of 21101423044343 in words is "twenty-one trillion, one hundred one billion, four hundred twenty-three million, forty-four thousand, three hundred forty-three".