21321421122 has 64 divisors (see below), whose sum is σ = 44852745600. Its totient is φ = 6747417600.

The previous prime is 21321421091. The next prime is 21321421127. The reversal of 21321421122 is 22112412312.

It is a happy number.

It is a super-3 number, since 3×21321421122³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21321421127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8170954 + ... + 8173562.

It is an arithmetic number, because the mean of its divisors is an integer number (700824150).

Almost surely, 2^21321421122 is an apocalyptic number.

21321421122 is an abundant number, since it is smaller than the sum of its proper divisors (23531324478).

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

21321421122 is a wasteful number, since it uses less digits than its factorization.

21321421122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3411.

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

Adding to 21321421122 its reverse (22112412312), we get a palindrome (43433833434).

The spelling of 21321421122 in words is "twenty-one billion, three hundred twenty-one million, four hundred twenty-one thousand, one hundred twenty-two".