3116121505 has 32 divisors (see below), whose sum is σ = 4763093760. Its totient is φ = 1905223680.

The previous prime is 3116121473. The next prime is 3116121509. The reversal of 3116121505 is 5051216113.

It is a happy number.

It is not a de Polignac number, because 3116121505 - 2⁵ = 3116121473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3116121505.

It is not an unprimeable number, because it can be changed into a prime (3116121509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126516 + ... + 149125.

It is an arithmetic number, because the mean of its divisors is an integer number (148846680).

Almost surely, 2^3116121505 is an apocalyptic number.

3116121505 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3116121505 is a deficient number, since it is larger than the sum of its proper divisors (1646972255).

3116121505 is a wasteful number, since it uses less digits than its factorization.

3116121505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275689.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 3116121505 is about 55822.2312793031. The cubic root of 3116121505 is about 1460.6229756812.

Adding to 3116121505 its reverse (5051216113), we get a palindrome (8167337618).

The spelling of 3116121505 in words is "three billion, one hundred sixteen million, one hundred twenty-one thousand, five hundred five".