21411401271 has 32 divisors (see below), whose sum is σ = 30861358080. Its totient is φ = 13126320000.

The previous prime is 21411401239. The next prime is 21411401273. The reversal of 21411401271 is 17210411412.

It is a happy number.

It is not a de Polignac number, because 21411401271 - 2⁵ = 21411401239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411401273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18129301 + ... + 18130481.

It is an arithmetic number, because the mean of its divisors is an integer number (964417440).

Almost surely, 2^21411401271 is an apocalyptic number.

21411401271 is a deficient number, since it is larger than the sum of its proper divisors (9449956809).

21411401271 is a wasteful number, since it uses less digits than its factorization.

21411401271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2567.

The product of its (nonzero) digits is 448, while the sum is 24.

Adding to 21411401271 its reverse (17210411412), we get a palindrome (38621812683).

The spelling of 21411401271 in words is "twenty-one billion, four hundred eleven million, four hundred one thousand, two hundred seventy-one".