21442140210431 has 8 divisors (see below), whose sum is σ = 21448805378400. Its totient is φ = 21435476050912.

The previous prime is 21442140210409. The next prime is 21442140210509. The reversal of 21442140210431 is 13401204124412.

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 21442140210431 - 2⁶ = 21442140210367 is a prime.

It is a super-2 number, since 2×21442140210431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21442140210394 and 21442140210403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442140210331) 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, 43448741 + ... + 43939473.

It is an arithmetic number, because the mean of its divisors is an integer number (2681100672300).

Almost surely, 2^{21442140210431} is an apocalyptic number.

21442140210431 is a deficient number, since it is larger than the sum of its proper divisors (6665167969).

21442140210431 is an equidigital number, since it uses as much as digits as its factorization.

21442140210431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504225.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 21442140210431 its reverse (13401204124412), we get a palindrome (34843344334843).

The spelling of 21442140210431 in words is "twenty-one trillion, four hundred forty-two billion, one hundred forty million, two hundred ten thousand, four hundred thirty-one".