1331320221151 has 2 divisors, whose sum is σ = 1331320221152. Its totient is φ = 1331320221150.

The previous prime is 1331320221139. The next prime is 1331320221173. The reversal of 1331320221151 is 1511220231331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1331320221151 - 2²¹ = 1331318123999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331320221551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665660110575 + 665660110576.

It is an arithmetic number, because the mean of its divisors is an integer number (665660110576).

Almost surely, 2^{1331320221151} is an apocalyptic number.

1331320221151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331320221151 is an equidigital number, since it uses as much as digits as its factorization.

1331320221151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 1331320221151 its reverse (1511220231331), we get a palindrome (2842540452482).

The spelling of 1331320221151 in words is "one trillion, three hundred thirty-one billion, three hundred twenty million, two hundred twenty-one thousand, one hundred fifty-one".