110021110120021 has 24 divisors (see below), whose sum is σ = 120248141139000. Its totient is φ = 100529414133120.

The previous prime is 110021110119989. The next prime is 110021110120043. The reversal of 110021110120021 is 120021011120011.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3215706111121 + 106805404008900 = 1793239^2 + 10334670^2 .

It is not a de Polignac number, because 110021110120021 - 2⁵ = 110021110119989 is a prime.

It is a super-3 number, since 3×110021110120021³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110021110119983 and 110021110120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110021110120091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4267255 + ... + 15435403.

It is an arithmetic number, because the mean of its divisors is an integer number (5010339214125).

Almost surely, 2^{110021110120021} is an apocalyptic number.

It is an amenable number.

110021110120021 is a deficient number, since it is larger than the sum of its proper divisors (10227031018979).

110021110120021 is a wasteful number, since it uses less digits than its factorization.

110021110120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11169157 (or 11169138 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 110021110120021 its reverse (120021011120011), we get a palindrome (230042121240032).

The spelling of 110021110120021 in words is "one hundred ten trillion, twenty-one billion, one hundred ten million, one hundred twenty thousand, twenty-one".