21210132031211 has 4 divisors (see below), whose sum is σ = 21220679090424. Its totient is φ = 21199584972000.

The previous prime is 21210132031183. The next prime is 21210132031331. The reversal of 21210132031211 is 11213023101212.

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 21210132031211 - 2¹⁰ = 21210132030187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210132081211) 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, 5273526590 + ... + 5273530611.

It is an arithmetic number, because the mean of its divisors is an integer number (5305169772606).

Almost surely, 2^{21210132031211} is an apocalyptic number.

21210132031211 is a deficient number, since it is larger than the sum of its proper divisors (10547059213).

21210132031211 is a wasteful number, since it uses less digits than its factorization.

21210132031211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10547059212.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21210132031211 its reverse (11213023101212), we get a palindrome (32423155132423).

The spelling of 21210132031211 in words is "twenty-one trillion, two hundred ten billion, one hundred thirty-two million, thirty-one thousand, two hundred eleven".