21010221321122 has 16 divisors (see below), whose sum is σ = 34380514713600. Its totient is φ = 9550058225040.

The previous prime is 21010221321101. The next prime is 21010221321157. The reversal of 21010221321122 is 22112312201012.

It is a junction number, because it is equal to n+sod(n) for n = 21010221321094 and 21010221321103.

It is an unprimeable number.

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, 3254879 + ... + 7253597.

It is an arithmetic number, because the mean of its divisors is an integer number (2148782169600).

Almost surely, 2^{21010221321122} is an apocalyptic number.

21010221321122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21010221321122 is a deficient number, since it is larger than the sum of its proper divisors (13370293392478).

21010221321122 is a wasteful number, since it uses less digits than its factorization.

21010221321122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4237561.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21010221321122 its reverse (22112312201012), we get a palindrome (43122533522134).

The spelling of 21010221321122 in words is "twenty-one trillion, ten billion, two hundred twenty-one million, three hundred twenty-one thousand, one hundred twenty-two".