21122110211001 has 8 divisors (see below), whose sum is σ = 28335591612960. Its totient is φ = 13995017808192.

The previous prime is 21122110210973. The next prime is 21122110211087. The reversal of 21122110211001 is 10011201122112.

It is a happy number.

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

It is not a de Polignac number, because 21122110211001 - 2¹⁵ = 21122110178233 is a prime.

It is a super-2 number, since 2×21122110211001² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122110911001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21597249216 + ... + 21597250193.

It is an arithmetic number, because the mean of its divisors is an integer number (3541948951620).

Almost surely, 2^{21122110211001} is an apocalyptic number.

It is an amenable number.

21122110211001 is a deficient number, since it is larger than the sum of its proper divisors (7213481401959).

21122110211001 is a wasteful number, since it uses less digits than its factorization.

21122110211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43194499575.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21122110211001 its reverse (10011201122112), we get a palindrome (31133311333113).

The spelling of 21122110211001 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred ten million, two hundred eleven thousand, one".