100220211121 has 4 divisors (see below), whose sum is σ = 103676080500. Its totient is φ = 96764341744.

The previous prime is 100220211103. The next prime is 100220211137. The reversal of 100220211121 is 121112022001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121112022001 = 23 ⋅5265740087.

It can be written as a sum of positive squares in 2 ways, for example, as 40957664400 + 59262546721 = 202380^2 + 243439^2 .

It is a cyclic number.

It is not a de Polignac number, because 100220211121 - 2⁹ = 100220210609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100220211151) 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, 1727934646 + ... + 1727934703.

It is an arithmetic number, because the mean of its divisors is an integer number (25919020125).

Almost surely, 2^100220211121 is an apocalyptic number.

It is an amenable number.

100220211121 is a deficient number, since it is larger than the sum of its proper divisors (3455869379).

100220211121 is an equidigital number, since it uses as much as digits as its factorization.

100220211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3455869378.

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

Adding to 100220211121 its reverse (121112022001), we get a palindrome (221332233122).

The spelling of 100220211121 in words is "one hundred billion, two hundred twenty million, two hundred eleven thousand, one hundred twenty-one".