121131222001 has 4 divisors (see below), whose sum is σ = 121133286052. Its totient is φ = 121129157952.

The previous prime is 121131221989. The next prime is 121131222011. The reversal of 121131222001 is 100222131121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 98570881600 + 22560340401 = 313960^2 + 150201^2 .

It is a cyclic number.

It is not a de Polignac number, because 121131222001 - 2⁵ = 121131221969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121131222011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 941340 + ... + 1062253.

It is an arithmetic number, because the mean of its divisors is an integer number (30283321513).

Almost surely, 2^121131222001 is an apocalyptic number.

It is an amenable number.

121131222001 is a deficient number, since it is larger than the sum of its proper divisors (2064051).

121131222001 is an equidigital number, since it uses as much as digits as its factorization.

121131222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064050.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121131222001 its reverse (100222131121), we get a palindrome (221353353122).

The spelling of 121131222001 in words is "one hundred twenty-one billion, one hundred thirty-one million, two hundred twenty-two thousand, one".