21202145440511 has 8 divisors (see below), whose sum is σ = 25284546115584. Its totient is φ = 17383125454200.

The previous prime is 21202145440507. The next prime is 21202145440537. The reversal of 21202145440511 is 11504454120212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21202145440511 - 2² = 21202145440507 is a prime.

It is a super-2 number, since 2×21202145440511² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202145440501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65845172015 + ... + 65845172336.

It is an arithmetic number, because the mean of its divisors is an integer number (3160568264448).

Almost surely, 2^{21202145440511} is an apocalyptic number.

21202145440511 is a deficient number, since it is larger than the sum of its proper divisors (4082400675073).

21202145440511 is a wasteful number, since it uses less digits than its factorization.

21202145440511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131690344381.

The product of its (nonzero) digits is 12800, while the sum is 32.

Adding to 21202145440511 its reverse (11504454120212), we get a palindrome (32706599560723).

The spelling of 21202145440511 in words is "twenty-one trillion, two hundred two billion, one hundred forty-five million, four hundred forty thousand, five hundred eleven".