21211002210122 has 8 divisors (see below), whose sum is σ = 31831881041700. Its totient is φ = 10600375196224.

The previous prime is 21211002210121. The next prime is 21211002210133. The reversal of 21211002210122 is 22101220011212.

It can be written as a sum of positive squares in 2 ways, for example, as 21120743424361 + 90258785761 = 4595731^2 + 300431^2 .

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

It is a super-2 number, since 2×21211002210122² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21211002210122.

It is not an unprimeable number, because it can be changed into a prime (21211002210121) 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 3 ways as a sum of consecutive naturals, for example, 2562949247 + ... + 2562957522.

Almost surely, 2^{21211002210122} is an apocalyptic number.

21211002210122 is a deficient number, since it is larger than the sum of its proper divisors (10620878831578).

21211002210122 is a wasteful number, since it uses less digits than its factorization.

21211002210122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5125908840.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21211002210122 its reverse (22101220011212), we get a palindrome (43312222221334).

The spelling of 21211002210122 in words is "twenty-one trillion, two hundred eleven billion, two million, two hundred ten thousand, one hundred twenty-two".