1001221122 has 16 divisors (see below), whose sum is σ = 2184482592. Its totient is φ = 303400320.

The previous prime is 1001221097. The next prime is 1001221127. The reversal of 1001221122 is 2211221001.

1001221122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1001221098 and 1001221107.

It is not an unprimeable number, because it can be changed into a prime (1001221127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7584943 + ... + 7585074.

It is an arithmetic number, because the mean of its divisors is an integer number (136530162).

Almost surely, 2^1001221122 is an apocalyptic number.

1001221122 is an abundant number, since it is smaller than the sum of its proper divisors (1183261470).

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

1001221122 is a wasteful number, since it uses less digits than its factorization.

1001221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15170033.

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

The square root of 1001221122 is about 31642.0783451404. The cubic root of 1001221122 is about 1000.4068750969.

Adding to 1001221122 its reverse (2211221001), we get a palindrome (3212442123).

It can be divided in two parts, 1001 and 221122, that multiplied together give a palindrome (221343122).

The spelling of 1001221122 in words is "one billion, one million, two hundred twenty-one thousand, one hundred twenty-two".