1221113152387 has 2 divisors, whose sum is σ = 1221113152388. Its totient is φ = 1221113152386.

The previous prime is 1221113152307. The next prime is 1221113152421. The reversal of 1221113152387 is 7832513111221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221113152387 - 2¹¹ = 1221113150339 is a prime.

It is a super-2 number, since 2×1221113152387² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1221113152307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610556576193 + 610556576194.

It is an arithmetic number, because the mean of its divisors is an integer number (610556576194).

Almost surely, 2^{1221113152387} is an apocalyptic number.

1221113152387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221113152387 is an equidigital number, since it uses as much as digits as its factorization.

1221113152387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 37.

The spelling of 1221113152387 in words is "one trillion, two hundred twenty-one billion, one hundred thirteen million, one hundred fifty-two thousand, three hundred eighty-seven".