21020121102022 has 32 divisors (see below), whose sum is σ = 36263421849600. Its totient is φ = 8951554025568.

The previous prime is 21020121101989. The next prime is 21020121102049. The reversal of 21020121102022 is 22020112102012.

It is a happy number.

It is a super-2 number, since 2×21020121102022² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21020121101987 and 21020121102005.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 5234997 + ... + 8333392.

It is an arithmetic number, because the mean of its divisors is an integer number (1133231932800).

Almost surely, 2^{21020121102022} is an apocalyptic number.

21020121102022 is a deficient number, since it is larger than the sum of its proper divisors (15243300747578).

21020121102022 is a wasteful number, since it uses less digits than its factorization.

21020121102022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13569100.

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

Adding to 21020121102022 its reverse (22020112102012), we get a palindrome (43040233204034).

The spelling of 21020121102022 in words is "twenty-one trillion, twenty billion, one hundred twenty-one million, one hundred two thousand, twenty-two".