21232122 has 8 divisors (see below), whose sum is σ = 42464256. Its totient is φ = 7077372.

The previous prime is 21232121. The next prime is 21232157. The reversal of 21232122 is 22123212.

It is a happy number.

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

21232122 is an admirable number.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21232121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1769338 + ... + 1769349.

It is an arithmetic number, because the mean of its divisors is an integer number (5308032).

Almost surely, 2^21232122 is an apocalyptic number.

21232122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21232122 is a wasteful number, since it uses less digits than its factorization.

21232122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3538692.

The product of its digits is 96, while the sum is 15.

The square root of 21232122 is about 4607.8326792539. The cubic root of 21232122 is about 276.9052141731.

Adding to 21232122 its reverse (22123212), we get a palindrome (43355334).

It can be divided in two parts, 2123212 and 2, that multiplied together give a palindrome (4246424).

The spelling of 21232122 in words is "twenty-one million, two hundred thirty-two thousand, one hundred twenty-two".