100111222021021 has 4 divisors (see below), whose sum is σ = 100111795409500. Its totient is φ = 100110648632544.

The previous prime is 100111222021001. The next prime is 100111222021067. The reversal of 100111222021021 is 120120222111001.

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 47518122568921 + 52593099452100 = 6893339^2 + 7252110^2 .

It is a cyclic number.

It is not a de Polignac number, because 100111222021021 - 2⁵ = 100111222020989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100111222020986 and 100111222021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100111222021001) 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, 286432266 + ... + 286781563.

It is an arithmetic number, because the mean of its divisors is an integer number (25027948852375).

Almost surely, 2^{100111222021021} is an apocalyptic number.

It is an amenable number.

100111222021021 is a deficient number, since it is larger than the sum of its proper divisors (573388479).

100111222021021 is an equidigital number, since it uses as much as digits as its factorization.

100111222021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573388478.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 100111222021021 its reverse (120120222111001), we get a palindrome (220231444132022).

The spelling of 100111222021021 in words is "one hundred trillion, one hundred eleven billion, two hundred twenty-two million, twenty-one thousand, twenty-one".