21221020001122 has 8 divisors (see below), whose sum is σ = 32146693665372. Its totient is φ = 10505455446000.

The previous prime is 21221020001047. The next prime is 21221020001197. The reversal of 21221020001122 is 22110002012212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21221020001047) and next prime (21221020001197).

It can be written as a sum of positive squares in 2 ways, for example, as 21183457297401 + 37562703721 = 4602549^2 + 193811^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21221020001096 and 21221020001105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52527277029 + ... + 52527277432.

Almost surely, 2^{21221020001122} is an apocalyptic number.

21221020001122 is a deficient number, since it is larger than the sum of its proper divisors (10925673664250).

21221020001122 is a wasteful number, since it uses less digits than its factorization.

21221020001122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105054554564.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21221020001122 its reverse (22110002012212), we get a palindrome (43331022013334).

The spelling of 21221020001122 in words is "twenty-one trillion, two hundred twenty-one billion, twenty million, one thousand, one hundred twenty-two".