21332211215 has 16 divisors (see below), whose sum is σ = 29294084160. Its totient is φ = 14608561920.

The previous prime is 21332211179. The next prime is 21332211311. The reversal of 21332211215 is 51211223312.

It is not a de Polignac number, because 21332211215 - 2¹⁰ = 21332210191 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373820 + ... + 427089.

It is an arithmetic number, because the mean of its divisors is an integer number (1830880260).

Almost surely, 2^21332211215 is an apocalyptic number.

21332211215 is a deficient number, since it is larger than the sum of its proper divisors (7961872945).

21332211215 is an equidigital number, since it uses as much as digits as its factorization.

21332211215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801682.

The product of its digits is 720, while the sum is 23.

Adding to 21332211215 its reverse (51211223312), we get a palindrome (72543434527).

The spelling of 21332211215 in words is "twenty-one billion, three hundred thirty-two million, two hundred eleven thousand, two hundred fifteen".