1223111137687 has 2 divisors, whose sum is σ = 1223111137688. Its totient is φ = 1223111137686.

The previous prime is 1223111137681. The next prime is 1223111137723. The reversal of 1223111137687 is 7867311113221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1223111137687 - 2¹¹ = 1223111135639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223111137681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611555568843 + 611555568844.

It is an arithmetic number, because the mean of its divisors is an integer number (611555568844).

Almost surely, 2^{1223111137687} is an apocalyptic number.

1223111137687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223111137687 is an equidigital number, since it uses as much as digits as its factorization.

1223111137687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 43.

The spelling of 1223111137687 in words is "one trillion, two hundred twenty-three billion, one hundred eleven million, one hundred thirty-seven thousand, six hundred eighty-seven".