21242750401279 has 8 divisors (see below), whose sum is σ = 23173982114688. Its totient is φ = 19311530785560.

The previous prime is 21242750401253. The next prime is 21242750401337. The reversal of 21242750401279 is 97210405724212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21242750401279 - 2⁷ = 21242750401151 is a prime.

It is a super-2 number, since 2×21242750401279² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21242750401679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864504 + ... + 6575170.

It is an arithmetic number, because the mean of its divisors is an integer number (2896747764336).

Almost surely, 2^{21242750401279} is an apocalyptic number.

21242750401279 is a deficient number, since it is larger than the sum of its proper divisors (1931231713409).

21242750401279 is a wasteful number, since it uses less digits than its factorization.

21242750401279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6048845.

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 21242750401279 in words is "twenty-one trillion, two hundred forty-two billion, seven hundred fifty million, four hundred one thousand, two hundred seventy-nine".