100121220111 has 16 divisors (see below), whose sum is σ = 145741171968. Its totient is φ = 60633566400.

The previous prime is 100121220083. The next prime is 100121220131. The reversal of 100121220111 is 111022121001.

It is not a de Polignac number, because 100121220111 - 2⁶ = 100121220047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121220131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1104771 + ... + 1191956.

It is an arithmetic number, because the mean of its divisors is an integer number (9108823248).

Almost surely, 2^100121220111 is an apocalyptic number.

100121220111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

100121220111 is a deficient number, since it is larger than the sum of its proper divisors (45619951857).

100121220111 is a wasteful number, since it uses less digits than its factorization.

100121220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298062.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 100121220111 its reverse (111022121001), we get a palindrome (211143341112).

The spelling of 100121220111 in words is "one hundred billion, one hundred twenty-one million, two hundred twenty thousand, one hundred eleven".