121220111100111 has 8 divisors (see below), whose sum is σ = 161839202207664. Its totient is φ = 80707213696320.

The previous prime is 121220111100071. The next prime is 121220111100169. The reversal of 121220111100111 is 111001111022121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121220111100111 - 2²³ = 121220102711503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220111107111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26548423276 + ... + 26548427841.

It is an arithmetic number, because the mean of its divisors is an integer number (20229900275958).

Almost surely, 2^{121220111100111} is an apocalyptic number.

121220111100111 is a deficient number, since it is larger than the sum of its proper divisors (40619091107553).

121220111100111 is an equidigital number, since it uses as much as digits as its factorization.

121220111100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53096851881.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 121220111100111 its reverse (111001111022121), we get a palindrome (232221222122232).

The spelling of 121220111100111 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, one hundred thousand, one hundred eleven".