21202131441 has 16 divisors (see below), whose sum is σ = 28705757184. Its totient is φ = 13916840784.

The previous prime is 21202131421. The next prime is 21202131443. The reversal of 21202131441 is 14413120212.

It is not a de Polignac number, because 21202131441 - 2¹⁹ = 21201607153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21202131443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394216 + ... + 444758.

It is an arithmetic number, because the mean of its divisors is an integer number (1794109824).

Almost surely, 2^21202131441 is an apocalyptic number.

It is an amenable number.

21202131441 is a deficient number, since it is larger than the sum of its proper divisors (7503625743).

21202131441 is a wasteful number, since it uses less digits than its factorization.

21202131441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52700.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21202131441 its reverse (14413120212), we get a palindrome (35615251653).

The spelling of 21202131441 in words is "twenty-one billion, two hundred two million, one hundred thirty-one thousand, four hundred forty-one".