1001221331022 has 24 divisors (see below), whose sum is σ = 2366523146520. Its totient is φ = 303400403280.

The previous prime is 1001221330997. The next prime is 1001221331093. The reversal of 1001221331022 is 2201331221001.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1001221330986 and 1001221331004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2528336497 + ... + 2528336892.

It is an arithmetic number, because the mean of its divisors is an integer number (98605131105).

Almost surely, 2^{1001221331022} is an apocalyptic number.

1001221331022 is an abundant number, since it is smaller than the sum of its proper divisors (1365301815498).

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

1001221331022 is a wasteful number, since it uses less digits than its factorization.

1001221331022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5056673408 (or 5056673405 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1001221331022 its reverse (2201331221001), we get a palindrome (3202552552023).

The spelling of 1001221331022 in words is "one trillion, one billion, two hundred twenty-one million, three hundred thirty-one thousand, twenty-two".