11612170670021 has 4 divisors (see below), whose sum is σ = 11646628150092. Its totient is φ = 11577713189952.

The previous prime is 11612170669987. The next prime is 11612170670131. The reversal of 11612170670021 is 12007607121611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7969470150625 + 3642700519396 = 2823025^2 + 1908586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11612170670021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11612170670621) 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, 17228739530 + ... + 17228740203.

It is an arithmetic number, because the mean of its divisors is an integer number (2911657037523).

Almost surely, 2^{11612170670021} is an apocalyptic number.

It is an amenable number.

11612170670021 is a deficient number, since it is larger than the sum of its proper divisors (34457480071).

11612170670021 is an equidigital number, since it uses as much as digits as its factorization.

11612170670021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34457480070.

The product of its (nonzero) digits is 7056, while the sum is 35.

Adding to 11612170670021 its reverse (12007607121611), we get a palindrome (23619777791632).

The spelling of 11612170670021 in words is "eleven trillion, six hundred twelve billion, one hundred seventy million, six hundred seventy thousand, twenty-one".