21214211035231 has 4 divisors (see below), whose sum is σ = 21219980473512. Its totient is φ = 21208441596952.

The previous prime is 21214211035211. The next prime is 21214211035247. The reversal of 21214211035231 is 13253011241212.

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 21214211035231 - 2²⁵ = 21214177480799 is a prime.

It is a super-2 number, since 2×21214211035231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21214211035231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214211035201) 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, 2884713625 + ... + 2884720978.

It is an arithmetic number, because the mean of its divisors is an integer number (5304995118378).

Almost surely, 2^{21214211035231} is an apocalyptic number.

21214211035231 is a deficient number, since it is larger than the sum of its proper divisors (5769438281).

21214211035231 is an equidigital number, since it uses as much as digits as its factorization.

21214211035231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5769438280.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 21214211035231 its reverse (13253011241212), we get a palindrome (34467222276443).

The spelling of 21214211035231 in words is "twenty-one trillion, two hundred fourteen billion, two hundred eleven million, thirty-five thousand, two hundred thirty-one".