3261511021117 has 4 divisors (see below), whose sum is σ = 3261535934176. Its totient is φ = 3261486108060.

The previous prime is 3261511021079. The next prime is 3261511021121. The reversal of 3261511021117 is 7111201151623.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3261511021117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3261511021157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12259113 + ... + 12522334.

It is an arithmetic number, because the mean of its divisors is an integer number (815383983544).

Almost surely, 2^{3261511021117} is an apocalyptic number.

It is an amenable number.

3261511021117 is a deficient number, since it is larger than the sum of its proper divisors (24913059).

3261511021117 is a wasteful number, since it uses less digits than its factorization.

3261511021117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24913058.

The product of its (nonzero) digits is 2520, while the sum is 31.

The spelling of 3261511021117 in words is "three trillion, two hundred sixty-one billion, five hundred eleven million, twenty-one thousand, one hundred seventeen".