21001122101022 has 64 divisors (see below), whose sum is σ = 48033108480000. Its totient is φ = 5996503768320.

The previous prime is 21001122101021. The next prime is 21001122101087. The reversal of 21001122101022 is 22010122110012.

It is a junction number, because it is equal to n+sod(n) for n = 21001122100992 and 21001122101010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001122101021) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 535736979 + ... + 535776177.

It is an arithmetic number, because the mean of its divisors is an integer number (750517320000).

Almost surely, 2^{21001122101022} is an apocalyptic number.

21001122101022 is an abundant number, since it is smaller than the sum of its proper divisors (27031986378978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21001122101022 is a wasteful number, since it uses less digits than its factorization.

21001122101022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47001.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21001122101022 its reverse (22010122110012), we get a palindrome (43011244211034).

The spelling of 21001122101022 in words is "twenty-one trillion, one billion, one hundred twenty-two million, one hundred one thousand, twenty-two".