121102202021111 has 4 divisors (see below), whose sum is σ = 121109168741712. Its totient is φ = 121095235300512.

The previous prime is 121102202021081. The next prime is 121102202021149. The reversal of 121102202021111 is 111120202201121.

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-121102202021111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121102202021111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102202821111) 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, 3483334226 + ... + 3483368991.

It is an arithmetic number, because the mean of its divisors is an integer number (30277292185428).

Almost surely, 2^{121102202021111} is an apocalyptic number.

121102202021111 is a deficient number, since it is larger than the sum of its proper divisors (6966720601).

121102202021111 is an equidigital number, since it uses as much as digits as its factorization.

121102202021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6966720600.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121102202021111 its reverse (111120202201121), we get a palindrome (232222404222232).

The spelling of 121102202021111 in words is "one hundred twenty-one trillion, one hundred two billion, two hundred two million, twenty-one thousand, one hundred eleven".