1000121220222 has 48 divisors (see below), whose sum is σ = 2094308646528. Its totient is φ = 318373236720.

The previous prime is 1000121220169. The next prime is 1000121220227. The reversal of 1000121220222 is 2220221210001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000121220227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1753113 + ... + 2252475.

It is an arithmetic number, because the mean of its divisors is an integer number (43631430136).

Almost surely, 2^{1000121220222} is an apocalyptic number.

1000121220222 is an abundant number, since it is smaller than the sum of its proper divisors (1094187426306).

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

1000121220222 is a wasteful number, since it uses less digits than its factorization.

1000121220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500045 (or 500022 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1000121220222 its reverse (2220221210001), we get a palindrome (3220342430223).

The spelling of 1000121220222 in words is "one trillion, one hundred twenty-one million, two hundred twenty thousand, two hundred twenty-two".