1001121212 has 48 divisors (see below), whose sum is σ = 2164263360. Its totient is φ = 394578432.

The previous prime is 1001121193. The next prime is 1001121283. The reversal of 1001121212 is 2121211001.

It is a super-2 number, since 2×1001121212² = 2004487362232697888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1001121193 and 1001121202.

It is a congruent number.

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, 95864 + ... + 105792.

It is an arithmetic number, because the mean of its divisors is an integer number (45088820).

Almost surely, 2^1001121212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1001121212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1082131680).

1001121212 is an abundant number, since it is smaller than the sum of its proper divisors (1163142148).

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

1001121212 is a wasteful number, since it uses less digits than its factorization.

1001121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10230 (or 10228 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1001121212 is about 31640.4995535785. The cubic root of 1001121212 is about 1000.3735977407.

Adding to 1001121212 its reverse (2121211001), we get a palindrome (3122332213).

The spelling of 1001121212 in words is "one billion, one million, one hundred twenty-one thousand, two hundred twelve".