1211240330121 has 16 divisors (see below), whose sum is σ = 1706123585600. Its totient is φ = 762232171968.

The previous prime is 1211240330093. The next prime is 1211240330123. The reversal of 1211240330121 is 1210330421121.

It is not a de Polignac number, because 1211240330121 - 2¹¹ = 1211240328073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211240330123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38341306 + ... + 38372883.

It is an arithmetic number, because the mean of its divisors is an integer number (106632724100).

Almost surely, 2^{1211240330121} is an apocalyptic number.

It is an amenable number.

1211240330121 is a deficient number, since it is larger than the sum of its proper divisors (494883255479).

1211240330121 is a wasteful number, since it uses less digits than its factorization.

1211240330121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76714488.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1211240330121 its reverse (1210330421121), we get a palindrome (2421570751242).

The spelling of 1211240330121 in words is "one trillion, two hundred eleven billion, two hundred forty million, three hundred thirty thousand, one hundred twenty-one".