5111001111001 has 4 divisors (see below), whose sum is σ = 5111006973904. Its totient is φ = 5110995248100.

The previous prime is 5111001110989. The next prime is 5111001111017. The reversal of 5111001111001 is 1001111001115.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 5111001111001 - 2²¹ = 5110999013849 is a prime.

It is a super-2 number, since 2×5111001111001² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5111001121001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1333455 + ... + 3464116.

It is an arithmetic number, because the mean of its divisors is an integer number (1277751743476).

Almost surely, 2^{5111001111001} is an apocalyptic number.

It is an amenable number.

5111001111001 is a deficient number, since it is larger than the sum of its proper divisors (5862903).

5111001111001 is a wasteful number, since it uses less digits than its factorization.

5111001111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5862902.

The product of its (nonzero) digits is 5, while the sum is 13.

Adding to 5111001111001 its reverse (1001111001115), we get a palindrome (6112112112116).

The spelling of 5111001111001 in words is "five trillion, one hundred eleven billion, one million, one hundred eleven thousand, one".