121211122201 has 32 divisors (see below), whose sum is σ = 139007151360. Its totient is φ = 104882529024.

The previous prime is 121211122181. The next prime is 121211122223. The reversal of 121211122201 is 102221112121.

It is not a de Polignac number, because 121211122201 - 2¹¹ = 121211120153 is a prime.

It is a super-2 number, since 2×121211122201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121211122001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2684851 + ... + 2729623.

It is an arithmetic number, because the mean of its divisors is an integer number (4343973480).

Almost surely, 2^121211122201 is an apocalyptic number.

It is an amenable number.

121211122201 is a deficient number, since it is larger than the sum of its proper divisors (17796029159).

121211122201 is a wasteful number, since it uses less digits than its factorization.

121211122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45025.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121211122201 its reverse (102221112121), we get a palindrome (223432234322).

The spelling of 121211122201 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred twenty-two thousand, two hundred one".