110000121021 has 72 divisors (see below), whose sum is σ = 189650994624. Its totient is φ = 61222815360.

The previous prime is 110000121013. The next prime is 110000121041. The reversal of 110000121021 is 120121000011.

It is a happy number.

It is not a de Polignac number, because 110000121021 - 2³ = 110000121013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 110000120994 and 110000121012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110000121041) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 11693706 + ... + 11703108.

It is an arithmetic number, because the mean of its divisors is an integer number (2634041592).

Almost surely, 2^110000121021 is an apocalyptic number.

It is an amenable number.

110000121021 is a deficient number, since it is larger than the sum of its proper divisors (79650873603).

110000121021 is a wasteful number, since it uses less digits than its factorization.

110000121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10111 (or 10101 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 110000121021 its reverse (120121000011), we get a palindrome (230121121032).

The spelling of 110000121021 in words is "one hundred ten billion, one hundred twenty-one thousand, twenty-one".