2001122312 has 64 divisors (see below), whose sum is σ = 4339046400. Its totient is φ = 847506240.

The previous prime is 2001122303. The next prime is 2001122327. The reversal of 2001122312 is 2132211002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 1925489 + ... + 1926527.

It is an arithmetic number, because the mean of its divisors is an integer number (67797600).

Almost surely, 2^2001122312 is an apocalyptic number.

It is an amenable number.

2001122312 is an abundant number, since it is smaller than the sum of its proper divisors (2337924088).

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

2001122312 is a wasteful number, since it uses less digits than its factorization.

2001122312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426 (or 1422 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2001122312 is about 44733.9056197869. The cubic root of 2001122312 is about 1260.1566765782.

Adding to 2001122312 its reverse (2132211002), we get a palindrome (4133333314).

The spelling of 2001122312 in words is "two billion, one million, one hundred twenty-two thousand, three hundred twelve".