2001212122 has 32 divisors (see below), whose sum is σ = 3696787584. Its totient is φ = 791208000.

The previous prime is 2001212117. The next prime is 2001212149. The reversal of 2001212122 is 2212121002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

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, 538872 + ... + 542572.

It is an arithmetic number, because the mean of its divisors is an integer number (115524612).

Almost surely, 2^2001212122 is an apocalyptic number.

2001212122 is a deficient number, since it is larger than the sum of its proper divisors (1695575462).

2001212122 is a wasteful number, since it uses less digits than its factorization.

2001212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6694.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2001212122 is about 44734.9094332379. The cubic root of 2001212122 is about 1260.1755281625.

Adding to 2001212122 its reverse (2212121002), we get a palindrome (4213333124).

The spelling of 2001212122 in words is "two billion, one million, two hundred twelve thousand, one hundred twenty-two".