110001012021 has 12 divisors (see below), whose sum is σ = 159039838048. Its totient is φ = 73265013864.

The previous prime is 110001011977. The next prime is 110001012041. The reversal of 110001012021 is 120210100011.

It is a happy number.

It is not a de Polignac number, because 110001012021 - 2⁹ = 110001011509 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110001011994 and 110001012012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110001012041) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 5739415 + ... + 5758548.

Almost surely, 2^110001012021 is an apocalyptic number.

It is an amenable number.

110001012021 is a deficient number, since it is larger than the sum of its proper divisors (49038826027).

110001012021 is a wasteful number, since it uses less digits than its factorization.

110001012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11499032 (or 11499029 counting only the distinct ones).

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

Adding to 110001012021 its reverse (120210100011), we get a palindrome (230211112032).

The spelling of 110001012021 in words is "one hundred ten billion, one million, twelve thousand, twenty-one".