21410201231 has 4 divisors (see below), whose sum is σ = 21427708752. Its totient is φ = 21392693712.

The previous prime is 21410201221. The next prime is 21410201237. The reversal of 21410201231 is 13210201412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21410201231 - 2¹⁸ = 21409939087 is a prime.

It is a super-2 number, since 2×21410201231² (a number of 21 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 (21410201237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8751926 + ... + 8754371.

It is an arithmetic number, because the mean of its divisors is an integer number (5356927188).

Almost surely, 2^21410201231 is an apocalyptic number.

21410201231 is a deficient number, since it is larger than the sum of its proper divisors (17507521).

21410201231 is a wasteful number, since it uses less digits than its factorization.

21410201231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17507520.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21410201231 its reverse (13210201412), we get a palindrome (34620402643).

The spelling of 21410201231 in words is "twenty-one billion, four hundred ten million, two hundred one thousand, two hundred thirty-one".