121311221232131 has 24 divisors (see below), whose sum is σ = 143002683549936. Its totient is φ = 102598172328960.

The previous prime is 121311221232121. The next prime is 121311221232133. The reversal of 121311221232131 is 131232122113121.

It is not a de Polignac number, because 121311221232131 - 2⁶ = 121311221232067 is a prime.

It is a super-3 number, since 3×121311221232131³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 121311221232131.

It is not an unprimeable number, because it can be changed into a prime (121311221232133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36981266 + ... + 40127751.

It is an arithmetic number, because the mean of its divisors is an integer number (5958445147914).

Almost surely, 2^{121311221232131} is an apocalyptic number.

121311221232131 is a deficient number, since it is larger than the sum of its proper divisors (21691462317805).

121311221232131 is an equidigital number, since it uses as much as digits as its factorization.

121311221232131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77109459 (or 77109452 counting only the distinct ones).

The product of its digits is 864, while the sum is 26.

Adding to 121311221232131 its reverse (131232122113121), we get a palindrome (252543343345252).

The spelling of 121311221232131 in words is "one hundred twenty-one trillion, three hundred eleven billion, two hundred twenty-one million, two hundred thirty-two thousand, one hundred thirty-one".