21443103440129 has 24 divisors (see below), whose sum is σ = 26582339628288. Its totient is φ = 17206623994560.

The previous prime is 21443103440117. The next prime is 21443103440149. The reversal of 21443103440129 is 92104430134412.

It is not a de Polignac number, because 21443103440129 - 2¹⁶ = 21443103374593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21443103440092 and 21443103440101.

It is not an unprimeable number, because it can be changed into a prime (21443103440149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 202358852 + ... + 202464789.

It is an arithmetic number, because the mean of its divisors is an integer number (1107597484512).

Almost surely, 2^{21443103440129} is an apocalyptic number.

It is an amenable number.

21443103440129 is a deficient number, since it is larger than the sum of its proper divisors (5139236188159).

21443103440129 is a wasteful number, since it uses less digits than its factorization.

21443103440129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404823725 (or 404823718 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 21443103440129 in words is "twenty-one trillion, four hundred forty-three billion, one hundred three million, four hundred forty thousand, one hundred twenty-nine".