1000221121212 has 48 divisors (see below), whose sum is σ = 2397357205152. Its totient is φ = 324337720320.

The previous prime is 1000221121189. The next prime is 1000221121243. The reversal of 1000221121212 is 2121211220001.

It is a junction number, because it is equal to n+sod(n) for n = 1000221121191 and 1000221121200.

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, 2304928 + ... + 2704280.

It is an arithmetic number, because the mean of its divisors is an integer number (49944941774).

Almost surely, 2^{1000221121212} is an apocalyptic number.

1000221121212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1000221121212 is an abundant number, since it is smaller than the sum of its proper divisors (1397136083940).

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

1000221121212 is a wasteful number, since it uses less digits than its factorization.

1000221121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405038 (or 405036 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1000221121212 its reverse (2121211220001), we get a palindrome (3121432341213).

The spelling of 1000221121212 in words is "one trillion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twelve".