121020202100111 has 4 divisors (see below), whose sum is σ = 121024604943552. Its totient is φ = 121015799256672.

The previous prime is 121020202100093. The next prime is 121020202100191. The reversal of 121020202100111 is 111001202020121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121020202100111 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 (121020202100191) 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, 2201380490 + ... + 2201435463.

It is an arithmetic number, because the mean of its divisors is an integer number (30256151235888).

Almost surely, 2^{121020202100111} is an apocalyptic number.

121020202100111 is a deficient number, since it is larger than the sum of its proper divisors (4402843441).

121020202100111 is an equidigital number, since it uses as much as digits as its factorization.

121020202100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4402843440.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121020202100111 its reverse (111001202020121), we get a palindrome (232021404120232).

The spelling of 121020202100111 in words is "one hundred twenty-one trillion, twenty billion, two hundred two million, one hundred thousand, one hundred eleven".