131211121100221 has 8 divisors (see below), whose sum is σ = 142879623703200. Its totient is φ = 120018883909680.

The previous prime is 131211121100207. The next prime is 131211121100239. The reversal of 131211121100221 is 122001121112131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131211121100221 - 2²⁵ = 131211087545789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131211121103221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119066352535 + ... + 119066353636.

It is an arithmetic number, because the mean of its divisors is an integer number (17859952962900).

Almost surely, 2^{131211121100221} is an apocalyptic number.

It is an amenable number.

131211121100221 is a deficient number, since it is larger than the sum of its proper divisors (11668502602979).

131211121100221 is a wasteful number, since it uses less digits than its factorization.

131211121100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238132706219.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 131211121100221 its reverse (122001121112131), we get a palindrome (253212242212352).

The spelling of 131211121100221 in words is "one hundred thirty-one trillion, two hundred eleven billion, one hundred twenty-one million, one hundred thousand, two hundred twenty-one".