1191977380123 has 2 divisors, whose sum is σ = 1191977380124. Its totient is φ = 1191977380122.

The previous prime is 1191977380081. The next prime is 1191977380133. The reversal of 1191977380123 is 3210837791911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1191977380123 - 2¹⁷ = 1191977249051 is a prime.

It is not a weakly prime, because it can be changed into another prime (1191977380133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 595988690061 + 595988690062.

It is an arithmetic number, because the mean of its divisors is an integer number (595988690062).

Almost surely, 2^{1191977380123} is an apocalyptic number.

1191977380123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1191977380123 is an equidigital number, since it uses as much as digits as its factorization.

1191977380123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 52.

The spelling of 1191977380123 in words is "one trillion, one hundred ninety-one billion, nine hundred seventy-seven million, three hundred eighty thousand, one hundred twenty-three".