21434252252122 has 16 divisors (see below), whose sum is σ = 32315783846400. Its totient is φ = 10662435127600.

The previous prime is 21434252252111. The next prime is 21434252252123. The reversal of 21434252252122 is 22125225243412.

It is not an unprimeable number, because it can be changed into a prime (21434252252123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27318754 + ... + 28092397.

It is an arithmetic number, because the mean of its divisors is an integer number (2019736490400).

Almost surely, 2^{21434252252122} is an apocalyptic number.

21434252252122 is a deficient number, since it is larger than the sum of its proper divisors (10881531594278).

21434252252122 is a wasteful number, since it uses less digits than its factorization.

21434252252122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55412141.

The product of its digits is 153600, while the sum is 37.

Adding to 21434252252122 its reverse (22125225243412), we get a palindrome (43559477495534).

The spelling of 21434252252122 in words is "twenty-one trillion, four hundred thirty-four billion, two hundred fifty-two million, two hundred fifty-two thousand, one hundred twenty-two".