100121201111111 has 16 divisors (see below), whose sum is σ = 102472298188800. Its totient is φ = 97779349324800.

The previous prime is 100121201111101. The next prime is 100121201111131. The reversal of 100121201111111 is 111111102121001.

It is a cyclic number.

It is not a de Polignac number, because 100121201111111 - 2¹⁰ = 100121201110087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121201111101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219529490 + ... + 219985088.

It is an arithmetic number, because the mean of its divisors is an integer number (6404518636800).

Almost surely, 2^{100121201111111} is an apocalyptic number.

100121201111111 is a deficient number, since it is larger than the sum of its proper divisors (2351097077689).

100121201111111 is an equidigital number, since it uses as much as digits as its factorization.

100121201111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465734.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 100121201111111 its reverse (111111102121001), we get a palindrome (211232303232112).

The spelling of 100121201111111 in words is "one hundred trillion, one hundred twenty-one billion, two hundred one million, one hundred eleven thousand, one hundred eleven".