21110121022 has 8 divisors (see below), whose sum is σ = 31906900872. Its totient is φ = 10474487400.

The previous prime is 21110121013. The next prime is 21110121029. The reversal of 21110121022 is 22012101112.

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

It is a junction number, because it is equal to n+sod(n) for n = 21110120993 and 21110121011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110121029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40286229 + ... + 40286752.

It is an arithmetic number, because the mean of its divisors is an integer number (3988362609).

Almost surely, 2^21110121022 is an apocalyptic number.

21110121022 is a deficient number, since it is larger than the sum of its proper divisors (10796779850).

21110121022 is a wasteful number, since it uses less digits than its factorization.

21110121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80573114.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21110121022 its reverse (22012101112), we get a palindrome (43122222134).

The spelling of 21110121022 in words is "twenty-one billion, one hundred ten million, one hundred twenty-one thousand, twenty-two".