1187923129811 has 8 divisors (see below), whose sum is σ = 1296375883200. Its totient is φ = 1079547000040.

The previous prime is 1187923129801. The next prime is 1187923129817. The reversal of 1187923129811 is 1189213297811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1187923129811 is a prime.

It is a super-2 number, since 2×1187923129811² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1187923129817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19123481 + ... + 19185498.

It is an arithmetic number, because the mean of its divisors is an integer number (162046985400).

Almost surely, 2^{1187923129811} is an apocalyptic number.

1187923129811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1187923129811 is a deficient number, since it is larger than the sum of its proper divisors (108452753389).

1187923129811 is a wasteful number, since it uses less digits than its factorization.

1187923129811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38311809.

The product of its digits is 435456, while the sum is 53.

The spelling of 1187923129811 in words is "one trillion, one hundred eighty-seven billion, nine hundred twenty-three million, one hundred twenty-nine thousand, eight hundred eleven".