20111601283216 has 45 divisors (see below), whose sum is σ = 39138291537043. Its totient is φ = 10011591494240.

The previous prime is 20111601283201. The next prime is 20111601283219. The reversal of 20111601283216 is 61238210611102.

The square root of 20111601283216 is 4484596.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111601283219) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4287271431 + ... + 4287276121.

Almost surely, 2^{20111601283216} is an apocalyptic number.

20111601283216 is the 4484596-th square number.

It is an amenable number.

20111601283216 is a deficient number, since it is larger than the sum of its proper divisors (19026690253827).

20111601283216 is an frugal number, since it uses more digits than its factorization.

20111601283216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9868 (or 4932 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

Adding to 20111601283216 its reverse (61238210611102), we get a palindrome (81349811894318).

The spelling of 20111601283216 in words is "twenty trillion, one hundred eleven billion, six hundred one million, two hundred eighty-three thousand, two hundred sixteen".