110001012100021 has 4 divisors (see below), whose sum is σ = 125715442400032. Its totient is φ = 94286581800012.

The previous prime is 110001012100003. The next prime is 110001012100039. The reversal of 110001012100021 is 120001210100011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (110001012100003) and next prime (110001012100039).

It is not a de Polignac number, because 110001012100021 - 2⁷ = 110001012099893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110001012099980 and 110001012100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110001012140021) 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, 7857215149995 + ... + 7857215150008.

It is an arithmetic number, because the mean of its divisors is an integer number (31428860600008).

Almost surely, 2^{110001012100021} is an apocalyptic number.

It is an amenable number.

110001012100021 is a deficient number, since it is larger than the sum of its proper divisors (15714430300011).

110001012100021 is an equidigital number, since it uses as much as digits as its factorization.

110001012100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15714430300010.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 110001012100021 its reverse (120001210100011), we get a palindrome (230002222200032).

The spelling of 110001012100021 in words is "one hundred ten trillion, one billion, twelve million, one hundred thousand, twenty-one".