2111215601 has 16 divisors (see below), whose sum is σ = 2472985728. Its totient is φ = 1780934400.

The previous prime is 2111215559. The next prime is 2111215619. The reversal of 2111215601 is 1065121112.

It is a cyclic number.

It is not a de Polignac number, because 2111215601 - 2¹⁰ = 2111214577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111215651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66230 + ... + 92783.

It is an arithmetic number, because the mean of its divisors is an integer number (154561608).

Almost surely, 2^2111215601 is an apocalyptic number.

It is an amenable number.

2111215601 is a deficient number, since it is larger than the sum of its proper divisors (361770127).

2111215601 is a wasteful number, since it uses less digits than its factorization.

2111215601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159112.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 2111215601 is about 45947.9662335560. The cubic root of 2111215601 is about 1282.8548747846.

Adding to 2111215601 its reverse (1065121112), we get a palindrome (3176336713).

It can be divided in two parts, 2111 and 215601, that added together give a palindrome (217712).

The spelling of 2111215601 in words is "two billion, one hundred eleven million, two hundred fifteen thousand, six hundred one".