131211210330221 has 8 divisors (see below), whose sum is σ = 158776590651840. Its totient is φ = 105851060434368.

The previous prime is 131211210330217. The next prime is 131211210330253. The reversal of 131211210330221 is 122033012112131.

It is a happy number.

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 131211210330221 - 2² = 131211210330217 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131211210330281) 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, 551307606311 + ... + 551307606548.

It is an arithmetic number, because the mean of its divisors is an integer number (19847073831480).

Almost surely, 2^{131211210330221} is an apocalyptic number.

It is an amenable number.

131211210330221 is a deficient number, since it is larger than the sum of its proper divisors (27565380321619).

131211210330221 is a wasteful number, since it uses less digits than its factorization.

131211210330221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102615212883.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 131211210330221 its reverse (122033012112131), we get a palindrome (253244222442352).

The spelling of 131211210330221 in words is "one hundred thirty-one trillion, two hundred eleven billion, two hundred ten million, three hundred thirty thousand, two hundred twenty-one".