110021120021 has 4 divisors (see below), whose sum is σ = 110029613772. Its totient is φ = 110012626272.

The previous prime is 110021119993. The next prime is 110021120089. The reversal of 110021120021 is 120021120011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53286643921 + 56734476100 = 230839^2 + 238190^2 .

It is a cyclic number.

It is not a de Polignac number, because 110021120021 - 2²² = 110016925717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110021119984 and 110021120011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110021120221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4227416 + ... + 4253361.

It is an arithmetic number, because the mean of its divisors is an integer number (27507403443).

Almost surely, 2^110021120021 is an apocalyptic number.

It is an amenable number.

110021120021 is a deficient number, since it is larger than the sum of its proper divisors (8493751).

110021120021 is an equidigital number, since it uses as much as digits as its factorization.

110021120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8493750.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 110021120021 its reverse (120021120011), we get a palindrome (230042240032).

The spelling of 110021120021 in words is "one hundred ten billion, twenty-one million, one hundred twenty thousand, twenty-one".