1221312303287 has 2 divisors, whose sum is σ = 1221312303288. Its totient is φ = 1221312303286.

The previous prime is 1221312303251. The next prime is 1221312303331. The reversal of 1221312303287 is 7823032131221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221312303287 - 2¹² = 1221312299191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221312333287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610656151643 + 610656151644.

It is an arithmetic number, because the mean of its divisors is an integer number (610656151644).

Almost surely, 2^{1221312303287} is an apocalyptic number.

1221312303287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221312303287 is an equidigital number, since it uses as much as digits as its factorization.

1221312303287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The spelling of 1221312303287 in words is "one trillion, two hundred twenty-one billion, three hundred twelve million, three hundred three thousand, two hundred eighty-seven".