110120021001 has 48 divisors (see below), whose sum is σ = 170816875840. Its totient is φ = 68155084800.

The previous prime is 110120020999. The next prime is 110120021027. The reversal of 110120021001 is 100120021011.

It is a happy number.

It is not a de Polignac number, because 110120021001 - 2¹ = 110120020999 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 not an unprimeable number, because it can be changed into a prime (110120021041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2186301 + ... + 2236101.

Almost surely, 2^110120021001 is an apocalyptic number.

It is an amenable number.

110120021001 is a deficient number, since it is larger than the sum of its proper divisors (60696854839).

110120021001 is a wasteful number, since it uses less digits than its factorization.

110120021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50086 (or 50083 counting only the distinct ones).

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

Adding to 110120021001 its reverse (100120021011), we get a palindrome (210240042012).

The spelling of 110120021001 in words is "one hundred ten billion, one hundred twenty million, twenty-one thousand, one".