2001121212 has 48 divisors (see below), whose sum is σ = 4810972320. Its totient is φ = 647083008.

The previous prime is 2001121193. The next prime is 2001121217. The reversal of 2001121212 is 2121211002.

It is a super-2 number, since 2×2001121212² = 8008972210232697888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001121217) 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, 38928 + ... + 74280.

It is an arithmetic number, because the mean of its divisors is an integer number (100228590).

Almost surely, 2^2001121212 is an apocalyptic number.

It is an amenable number.

2001121212 is an abundant number, since it is smaller than the sum of its proper divisors (2809851108).

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

2001121212 is a wasteful number, since it uses less digits than its factorization.

2001121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35502 (or 35500 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2001121212 is about 44733.8933248605. The cubic root of 2001121212 is about 1260.1564456790.

Adding to 2001121212 its reverse (2121211002), we get a palindrome (4122332214).

The spelling of 2001121212 in words is "two billion, one million, one hundred twenty-one thousand, two hundred twelve".