121111111222201 has 4 divisors (see below), whose sum is σ = 121150445785600. Its totient is φ = 121071776658804.

The previous prime is 121111111222193. The next prime is 121111111222301. The reversal of 121111111222201 is 102222111111121.

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 121111111222201 - 2³ = 121111111222193 is a prime.

It is a super-2 number, since 2×121111111222201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121111111222301) 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, 19667277081 + ... + 19667283238.

It is an arithmetic number, because the mean of its divisors is an integer number (30287611446400).

Almost surely, 2^{121111111222201} is an apocalyptic number.

It is an amenable number.

121111111222201 is a deficient number, since it is larger than the sum of its proper divisors (39334563399).

121111111222201 is an equidigital number, since it uses as much as digits as its factorization.

121111111222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39334563398.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 121111111222201 its reverse (102222111111121), we get a palindrome (223333222333322).

The spelling of 121111111222201 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand, two hundred one".