1000121222212 has 18 divisors (see below), whose sum is σ = 2035961059902. Its totient is φ = 428623380864.

The previous prime is 1000121222189. The next prime is 1000121222231. The reversal of 1000121222212 is 2122221210001.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 995872268356 + 4248953856 = 997934^2 + 65184^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2551329453 + ... + 2551329844.

Almost surely, 2^{1000121222212} is an apocalyptic number.

It is an amenable number.

1000121222212 is an abundant number, since it is smaller than the sum of its proper divisors (1035839837690).

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

1000121222212 is a wasteful number, since it uses less digits than its factorization.

1000121222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5102659315 (or 5102659306 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1000121222212 its reverse (2122221210001), we get a palindrome (3122342432213).

It can be divided in two parts, 10001 and 21222212, that multiplied together give a palindrome (212243342212).

The spelling of 1000121222212 in words is "one trillion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twelve".