121201001112111 has 16 divisors (see below), whose sum is σ = 165046115635200. Its totient is φ = 79078411468448.

The previous prime is 121201001112073. The next prime is 121201001112119. The reversal of 121201001112111 is 111211100102121.

It is a cyclic number.

It is not a de Polignac number, because 121201001112111 - 2¹⁰ = 121201001111087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201001112119) 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, 13187871 + ... + 20403968.

It is an arithmetic number, because the mean of its divisors is an integer number (10315382227200).

Almost surely, 2^{121201001112111} is an apocalyptic number.

121201001112111 is a deficient number, since it is larger than the sum of its proper divisors (43845114523089).

121201001112111 is a wasteful number, since it uses less digits than its factorization.

121201001112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33617478.

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

Adding to 121201001112111 its reverse (111211100102121), we get a palindrome (232412101214232).

The spelling of 121201001112111 in words is "one hundred twenty-one trillion, two hundred one billion, one million, one hundred twelve thousand, one hundred eleven".