21021032132231 has 4 divisors (see below), whose sum is σ = 21041865663600. Its totient is φ = 21000198600864.

The previous prime is 21021032132197. The next prime is 21021032132263. The reversal of 21021032132231 is 13223123012012.

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 21021032132231 - 2⁶ = 21021032132167 is a prime.

It is a super-2 number, since 2×21021032132231² (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 = 21021032132197 and 21021032132206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021032192231) 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, 10416764171 + ... + 10416766188.

It is an arithmetic number, because the mean of its divisors is an integer number (5260466415900).

Almost surely, 2^{21021032132231} is an apocalyptic number.

21021032132231 is a deficient number, since it is larger than the sum of its proper divisors (20833531369).

21021032132231 is a wasteful number, since it uses less digits than its factorization.

21021032132231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20833531368.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21021032132231 its reverse (13223123012012), we get a palindrome (34244155144243).

The spelling of 21021032132231 in words is "twenty-one trillion, twenty-one billion, thirty-two million, one hundred thirty-two thousand, two hundred thirty-one".