100001102212021 has 4 divisors (see below), whose sum is σ = 100002590103052. Its totient is φ = 99999614320992.

The previous prime is 100001102212007. The next prime is 100001102212031. The reversal of 100001102212021 is 120212201100001.

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 71370630156996 + 28630472055025 = 8448114^2 + 5350745^2 .

It is a cyclic number.

It is not a de Polignac number, because 100001102212021 - 2⁹ = 100001102211509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100001102211992 and 100001102212010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001102212031) 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, 743844696 + ... + 743979121.

It is an arithmetic number, because the mean of its divisors is an integer number (25000647525763).

Almost surely, 2^{100001102212021} is an apocalyptic number.

It is an amenable number.

100001102212021 is a deficient number, since it is larger than the sum of its proper divisors (1487891031).

100001102212021 is an equidigital number, since it uses as much as digits as its factorization.

100001102212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487891030.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 100001102212021 its reverse (120212201100001), we get a palindrome (220213303312022).

The spelling of 100001102212021 in words is "one hundred trillion, one billion, one hundred two million, two hundred twelve thousand, twenty-one".