21332121213 has 32 divisors (see below), whose sum is σ = 31985694720. Its totient is φ = 12547592640.

The previous prime is 21332121197. The next prime is 21332121227. The reversal of 21332121213 is 31212123312.

It is not a de Polignac number, because 21332121213 - 2⁴ = 21332121197 is a prime.

It is a super-2 number, since 2×21332121213² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21332121213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21332121253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1347498 + ... + 1363236.

It is an arithmetic number, because the mean of its divisors is an integer number (999552960).

Almost surely, 2^21332121213 is an apocalyptic number.

21332121213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21332121213 is a deficient number, since it is larger than the sum of its proper divisors (10653573507).

21332121213 is a wasteful number, since it uses less digits than its factorization.

21332121213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17289.

The product of its digits is 432, while the sum is 21.

Adding to 21332121213 its reverse (31212123312), we get a palindrome (52544244525).

The spelling of 21332121213 in words is "twenty-one billion, three hundred thirty-two million, one hundred twenty-one thousand, two hundred thirteen".