2011011612172 has 48 divisors (see below), whose sum is σ = 3835734315840. Its totient is φ = 918930235392.

The previous prime is 2011011612157. The next prime is 2011011612187. The reversal of 2011011612172 is 2712161101102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2011011612157) and next prime (2011011612187).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2526672 + ... + 3225847.

It is an arithmetic number, because the mean of its divisors is an integer number (79911131580).

Almost surely, 2^{2011011612172} is an apocalyptic number.

It is an amenable number.

2011011612172 is a deficient number, since it is larger than the sum of its proper divisors (1824722703668).

2011011612172 is a wasteful number, since it uses less digits than its factorization.

2011011612172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5752690 (or 5752688 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 25.

Adding to 2011011612172 its reverse (2712161101102), we get a palindrome (4723172713274).

The spelling of 2011011612172 in words is "two trillion, eleven billion, eleven million, six hundred twelve thousand, one hundred seventy-two".