21422131202 has 8 divisors (see below), whose sum is σ = 32159346300. Its totient is φ = 10702349104.

The previous prime is 21422131187. The next prime is 21422131231. The reversal of 21422131202 is 20213122412.

It can be written as a sum of positive squares in 2 ways, for example, as 12741668641 + 8680462561 = 112879^2 + 93169^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4355177 + ... + 4360092.

Almost surely, 2^21422131202 is an apocalyptic number.

21422131202 is a deficient number, since it is larger than the sum of its proper divisors (10737215098).

21422131202 is a wasteful number, since it uses less digits than its factorization.

21422131202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8716500.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21422131202 its reverse (20213122412), we get a palindrome (41635253614).

The spelling of 21422131202 in words is "twenty-one billion, four hundred twenty-two million, one hundred thirty-one thousand, two hundred two".