21444014001401 has 16 divisors (see below), whose sum is σ = 22220427893760. Its totient is φ = 20670073032000.

The previous prime is 21444014001313. The next prime is 21444014001437. The reversal of 21444014001401 is 10410041044412.

It is a cyclic number.

It is not a de Polignac number, because 21444014001401 - 2¹⁸ = 21444013739257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21444014001301) 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, 148071776 + ... + 148216526.

It is an arithmetic number, because the mean of its divisors is an integer number (1388776743360).

Almost surely, 2^{21444014001401} is an apocalyptic number.

It is an amenable number.

21444014001401 is a deficient number, since it is larger than the sum of its proper divisors (776413892359).

21444014001401 is a wasteful number, since it uses less digits than its factorization.

21444014001401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153256.

The product of its (nonzero) digits is 2048, while the sum is 26.

Adding to 21444014001401 its reverse (10410041044412), we get a palindrome (31854055045813).

The spelling of 21444014001401 in words is "twenty-one trillion, four hundred forty-four billion, fourteen million, one thousand, four hundred one".