131221303211422 has 4 divisors (see below), whose sum is σ = 196831954817136. Its totient is φ = 65610651605710.

The previous prime is 131221303211389. The next prime is 131221303211459. The reversal of 131221303211422 is 224112303122131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32805325802854 + ... + 32805325802857.

It is an arithmetic number, because the mean of its divisors is an integer number (49207988704284).

Almost surely, 2^{131221303211422} is an apocalyptic number.

131221303211422 is a deficient number, since it is larger than the sum of its proper divisors (65610651605714).

131221303211422 is an equidigital number, since it uses as much as digits as its factorization.

131221303211422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65610651605713.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 131221303211422 its reverse (224112303122131), we get a palindrome (355333606333553).

The spelling of 131221303211422 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, three hundred three million, two hundred eleven thousand, four hundred twenty-two".