1001211221022 has 32 divisors (see below), whose sum is σ = 2069167985664.
Its totient is φ = 322971303960.
The previous prime is 1001211220987. The next prime is 1001211221033. The reversal of 1001211221022 is 2201221121001.
It is a junction number, because it is equal to n+sod(n) for n = 1001211220992 and 1001211221010.
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, 2621908 + ... + 2979399.
It is an arithmetic number, because the mean of its divisors is an integer number (64661499552).
Almost surely, 21001211221022 is an apocalyptic number.
1001211221022 is an abundant number, since it is smaller than the sum of its proper divisors (1067956764642).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1001211221022 is an frugal number, since it uses more digits than its factorization.
1001211221022 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5601405 (or 5601343 counting only the distinct ones).
The product of its (nonzero) digits is 32, while the sum is 15.
Adding to 1001211221022 its reverse (2201221121001), we get a palindrome (3202432342023).
The spelling of 1001211221022 in words is "one trillion, one billion, two hundred eleven million, two hundred twenty-one thousand, twenty-two".