100111211211211 has 4 divisors (see below), whose sum is σ = 100748862238192. Its totient is φ = 99473560184232.

The previous prime is 100111211211191. The next prime is 100111211211217. The reversal of 100111211211211 is 112112112111001.

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 100111211211211 - 2²⁷ = 100111076993483 is a prime.

It is a super-2 number, since 2×100111211211211² (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 (100111211211217) 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, 318825513255 + ... + 318825513568.

It is an arithmetic number, because the mean of its divisors is an integer number (25187215559548).

Almost surely, 2^{100111211211211} is an apocalyptic number.

100111211211211 is a deficient number, since it is larger than the sum of its proper divisors (637651026981).

100111211211211 is an equidigital number, since it uses as much as digits as its factorization.

100111211211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637651026980.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 100111211211211 its reverse (112112112111001), we get a palindrome (212223323322212).

It can be divided in two parts, 1001 and 11211211211, that multiplied together give a palindrome (11222422422211).

The spelling of 100111211211211 in words is "one hundred trillion, one hundred eleven billion, two hundred eleven million, two hundred eleven thousand, two hundred eleven".