100120221331 has 4 divisors (see below), whose sum is σ = 107821776832. Its totient is φ = 92418665832.

The previous prime is 100120221263. The next prime is 100120221343. The reversal of 100120221331 is 133122021001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100120221331 - 2⁹ = 100120220819 is a prime.

It is a super-2 number, since 2×100120221331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100120221031) 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, 3850777731 + ... + 3850777756.

It is an arithmetic number, because the mean of its divisors is an integer number (26955444208).

Almost surely, 2^100120221331 is an apocalyptic number.

100120221331 is a deficient number, since it is larger than the sum of its proper divisors (7701555501).

100120221331 is an equidigital number, since it uses as much as digits as its factorization.

100120221331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7701555500.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 100120221331 its reverse (133122021001), we get a palindrome (233242242332).

The spelling of 100120221331 in words is "one hundred billion, one hundred twenty million, two hundred twenty-one thousand, three hundred thirty-one".