21122404302 has 16 divisors (see below), whose sum is σ = 42246318672. Its totient is φ = 7040549760.

The previous prime is 21122404283. The next prime is 21122404309. The reversal of 21122404302 is 20340422112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122404309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209958 + ... + 293814.

It is an arithmetic number, because the mean of its divisors is an integer number (2640394917).

Almost surely, 2^21122404302 is an apocalyptic number.

21122404302 is an abundant number, since it is smaller than the sum of its proper divisors (21123914370).

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

21122404302 is a wasteful number, since it uses less digits than its factorization.

21122404302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125843.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21122404302 its reverse (20340422112), we get a palindrome (41462826414).

The spelling of 21122404302 in words is "twenty-one billion, one hundred twenty-two million, four hundred four thousand, three hundred two".