131203311221 has 8 divisors (see below), whose sum is σ = 132281670144. Its totient is φ = 130129030080.

The previous prime is 131203311181. The next prime is 131203311247. The reversal of 131203311221 is 122113302131.

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 131203311221 - 2⁶ = 131203311157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131203311193 and 131203311202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131203311121) 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, 954815 + ... + 1083548.

It is an arithmetic number, because the mean of its divisors is an integer number (16535208768).

Almost surely, 2^131203311221 is an apocalyptic number.

It is an amenable number.

131203311221 is a deficient number, since it is larger than the sum of its proper divisors (1078358923).

131203311221 is a wasteful number, since it uses less digits than its factorization.

131203311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038891.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 131203311221 its reverse (122113302131), we get a palindrome (253316613352).

The spelling of 131203311221 in words is "one hundred thirty-one billion, two hundred three million, three hundred eleven thousand, two hundred twenty-one".