100111220021211 has 24 divisors (see below), whose sum is σ = 153567389509632. Its totient is φ = 56827560762000.

The previous prime is 100111220021179. The next prime is 100111220021227. The reversal of 100111220021211 is 112120022111001.

It is a happy number.

It is not a de Polignac number, because 100111220021211 - 2⁵ = 100111220021179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100111220021411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104060475 + ... + 105018116.

It is an arithmetic number, because the mean of its divisors is an integer number (6398641229568).

Almost surely, 2^{100111220021211} is an apocalyptic number.

100111220021211 is a deficient number, since it is larger than the sum of its proper divisors (53456169488421).

100111220021211 is an equidigital number, since it uses as much as digits as its factorization.

100111220021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209078903 (or 209078752 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 100111220021211 its reverse (112120022111001), we get a palindrome (212231242132212).

The spelling of 100111220021211 in words is "one hundred trillion, one hundred eleven billion, two hundred twenty million, twenty-one thousand, two hundred eleven".