21402241321444 has 12 divisors (see below), whose sum is σ = 37650016147968. Its totient is φ = 10645093850600.

The previous prime is 21402241321429. The next prime is 21402241321477. The reversal of 21402241321444 is 44412314220412.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14006701672 + ... + 14006703199.

It is an arithmetic number, because the mean of its divisors is an integer number (3137501345664).

Almost surely, 2^{21402241321444} is an apocalyptic number.

It is an amenable number.

21402241321444 is a deficient number, since it is larger than the sum of its proper divisors (16247774826524).

21402241321444 is a wasteful number, since it uses less digits than its factorization.

21402241321444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28013405066 (or 28013405064 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 34.

Adding to 21402241321444 its reverse (44412314220412), we get a palindrome (65814555541856).

The spelling of 21402241321444 in words is "twenty-one trillion, four hundred two billion, two hundred forty-one million, three hundred twenty-one thousand, four hundred forty-four".