121211111120201 has 4 divisors (see below), whose sum is σ = 124029974169552. Its totient is φ = 118392248070852.

The previous prime is 121211111120173. The next prime is 121211111120291. The reversal of 121211111120201 is 102021111112121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121211111120201 - 2¹⁰ = 121211111119177 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 121211111120201.

It is not an unprimeable number, because it can be changed into a prime (121211111120291) 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, 1409431524611 + ... + 1409431524696.

It is an arithmetic number, because the mean of its divisors is an integer number (31007493542388).

Almost surely, 2^{121211111120201} is an apocalyptic number.

It is an amenable number.

121211111120201 is a deficient number, since it is larger than the sum of its proper divisors (2818863049351).

121211111120201 is an equidigital number, since it uses as much as digits as its factorization.

121211111120201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818863049350.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 121211111120201 its reverse (102021111112121), we get a palindrome (223232222232322).

The spelling of 121211111120201 in words is "one hundred twenty-one trillion, two hundred eleven billion, one hundred eleven million, one hundred twenty thousand, two hundred one".