11142031505 has 12 divisors (see below), whose sum is σ = 14696432436. Its totient is φ = 8103295200.

The previous prime is 11142031499. The next prime is 11142031513. The reversal of 11142031505 is 50513024111.

It can be written as a sum of positive squares in 2 ways, for example, as 3258012241 + 7884019264 = 57079^2 + 88792^2 .

It is not a de Polignac number, because 11142031505 - 2⁶ = 11142031441 is a prime.

It is a super-3 number, since 3×11142031505³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9207686 + ... + 9208895.

It is an arithmetic number, because the mean of its divisors is an integer number (1224702703).

Almost surely, 2^11142031505 is an apocalyptic number.

It is an amenable number.

11142031505 is a deficient number, since it is larger than the sum of its proper divisors (3554400931).

11142031505 is a wasteful number, since it uses less digits than its factorization.

11142031505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18416608 (or 18416597 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 11142031505 its reverse (50513024111), we get a palindrome (61655055616).

The spelling of 11142031505 in words is "eleven billion, one hundred forty-two million, thirty-one thousand, five hundred five".