121201001121 has 16 divisors (see below), whose sum is σ = 174704148800. Its totient is φ = 74479134528.

The previous prime is 121201001099. The next prime is 121201001123. The reversal of 121201001121 is 121100102121.

It is not a de Polignac number, because 121201001121 - 2¹⁸ = 121200738977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121201001097 and 121201001106.

It is not an unprimeable number, because it can be changed into a prime (121201001123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28732126 + ... + 28736343.

It is an arithmetic number, because the mean of its divisors is an integer number (10919009300).

Almost surely, 2^121201001121 is an apocalyptic number.

It is an amenable number.

121201001121 is a deficient number, since it is larger than the sum of its proper divisors (53503147679).

121201001121 is a wasteful number, since it uses less digits than its factorization.

121201001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57468528.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121201001121 its reverse (121100102121), we get a palindrome (242301103242).

The spelling of 121201001121 in words is "one hundred twenty-one billion, two hundred one million, one thousand, one hundred twenty-one".