2201121612 has 18 divisors (see below), whose sum is σ = 5563946388. Its totient is φ = 733707192.

The previous prime is 2201121599. The next prime is 2201121647. The reversal of 2201121612 is 2161211022.

2201121612 is a `hidden beast` number, since 2 + 20 + 11 + 21 + 612 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30571098 + ... + 30571169.

Almost surely, 2^2201121612 is an apocalyptic number.

It is an amenable number.

2201121612 is an abundant number, since it is smaller than the sum of its proper divisors (3362824776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2201121612 is a wasteful number, since it uses less digits than its factorization.

2201121612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61142277 (or 61142272 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 2201121612 is about 46916.1124987994. The cubic root of 2201121612 is about 1300.8124333879.

Adding to 2201121612 its reverse (2161211022), we get a palindrome (4362332634).

The spelling of 2201121612 in words is "two billion, two hundred one million, one hundred twenty-one thousand, six hundred twelve".