1151111512 has 8 divisors (see below), whose sum is σ = 2158334100. Its totient is φ = 575555752.

The previous prime is 1151111501. The next prime is 1151111519. The reversal of 1151111512 is 2151111511.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1151111512² = 2650115426117852288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1151111512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151111519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71944462 + ... + 71944477.

Almost surely, 2^1151111512 is an apocalyptic number.

It is an amenable number.

1151111512 is a deficient number, since it is larger than the sum of its proper divisors (1007222588).

1151111512 is a wasteful number, since it uses less digits than its factorization.

1151111512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143888945 (or 143888941 counting only the distinct ones).

The product of its digits is 50, while the sum is 19.

The square root of 1151111512 is about 33928.0343079289. The cubic root of 1151111512 is about 1048.0269863688.

Subtracting 1151111512 from its reverse (2151111511), we obtain a palindrome (999999999).

The spelling of 1151111512 in words is "one billion, one hundred fifty-one million, one hundred eleven thousand, five hundred twelve".