110001220021 has 16 divisors (see below), whose sum is σ = 137153386368. Its totient is φ = 85709606400.

The previous prime is 110001220019. The next prime is 110001220037. The reversal of 110001220021 is 120022100011.

It is not a de Polignac number, because 110001220021 - 2¹ = 110001220019 is a prime.

It is a super-2 number, since 2×110001220021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110001221021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1434961 + ... + 1509673.

It is an arithmetic number, because the mean of its divisors is an integer number (8572086648).

Almost surely, 2^110001220021 is an apocalyptic number.

110001220021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

110001220021 is a deficient number, since it is larger than the sum of its proper divisors (27152166347).

110001220021 is a wasteful number, since it uses less digits than its factorization.

110001220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93852.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 110001220021 its reverse (120022100011), we get a palindrome (230023320032).

The spelling of 110001220021 in words is "one hundred ten billion, one million, two hundred twenty thousand, twenty-one".