100021220211001 has 4 divisors (see below), whose sum is σ = 100114785432100. Its totient is φ = 99927654989904.

The previous prime is 100021220210987. The next prime is 100021220211013. The reversal of 100021220211001 is 100112022120001.

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 55766528354601 + 44254691856400 = 7467699^2 + 6652420^2 .

It is a cyclic number.

It is not a de Polignac number, because 100021220211001 - 2⁴⁵ = 64836848122169 is a prime.

It is a super-2 number, since 2×100021220211001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100021220211401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46782608946 + ... + 46782611083.

It is an arithmetic number, because the mean of its divisors is an integer number (25028696358025).

Almost surely, 2^{100021220211001} is an apocalyptic number.

It is an amenable number.

100021220211001 is a deficient number, since it is larger than the sum of its proper divisors (93565221099).

100021220211001 is an equidigital number, since it uses as much as digits as its factorization.

100021220211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93565221098.

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

Adding to 100021220211001 its reverse (100112022120001), we get a palindrome (200133242331002).

The spelling of 100021220211001 in words is "one hundred trillion, twenty-one billion, two hundred twenty million, two hundred eleven thousand, one".