1121712015 has 16 divisors (see below), whose sum is σ = 1810624608. Its totient is φ = 592951296.

The previous prime is 1121711999. The next prime is 1121712019. The reversal of 1121712015 is 5102171211.

It is not a de Polignac number, because 1121712015 - 2⁴ = 1121711999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121711982 and 1121712000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121712019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329194 + ... + 332583.

It is an arithmetic number, because the mean of its divisors is an integer number (113164038).

Almost surely, 2^1121712015 is an apocalyptic number.

1121712015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1121712015 is a deficient number, since it is larger than the sum of its proper divisors (688912593).

1121712015 is a wasteful number, since it uses less digits than its factorization.

1121712015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661898.

The product of its (nonzero) digits is 140, while the sum is 21.

The square root of 1121712015 is about 33491.9694105915. The cubic root of 1121712015 is about 1039.0276954962.

Adding to 1121712015 its reverse (5102171211), we get a palindrome (6223883226).

It can be divided in two parts, 11217 and 12015, that added together give a palindrome (23232).

The spelling of 1121712015 in words is "one billion, one hundred twenty-one million, seven hundred twelve thousand, fifteen".