21132211311421 has 8 divisors (see below), whose sum is σ = 25571751503040. Its totient is φ = 17047834335168.

The previous prime is 21132211311391. The next prime is 21132211311469. The reversal of 21132211311421 is 12411311223112.

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

It is not a de Polignac number, because 21132211311421 - 2¹⁹ = 21132210787133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132211314421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88790803711 + ... + 88790803948.

It is an arithmetic number, because the mean of its divisors is an integer number (3196468937880).

Almost surely, 2^{21132211311421} is an apocalyptic number.

It is an amenable number.

21132211311421 is a deficient number, since it is larger than the sum of its proper divisors (4439540191619).

21132211311421 is a wasteful number, since it uses less digits than its factorization.

21132211311421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177581607683.

The product of its digits is 576, while the sum is 25.

Adding to 21132211311421 its reverse (12411311223112), we get a palindrome (33543522534533).

The spelling of 21132211311421 in words is "twenty-one trillion, one hundred thirty-two billion, two hundred eleven million, three hundred eleven thousand, four hundred twenty-one".