21011122101022 has 4 divisors (see below), whose sum is σ = 31516683151536. Its totient is φ = 10505561050510.

The previous prime is 21011122101019. The next prime is 21011122101049. The reversal of 21011122101022 is 22010122111012.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21011122100987 and 21011122101005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252780525254 + ... + 5252780525257.

It is an arithmetic number, because the mean of its divisors is an integer number (7879170787884).

Almost surely, 2^{21011122101022} is an apocalyptic number.

21011122101022 is a deficient number, since it is larger than the sum of its proper divisors (10505561050514).

21011122101022 is a wasteful number, since it uses less digits than its factorization.

21011122101022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10505561050513.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21011122101022 its reverse (22010122111012), we get a palindrome (43021244212034).

The spelling of 21011122101022 in words is "twenty-one trillion, eleven billion, one hundred twenty-two million, one hundred one thousand, twenty-two".