1212221201022 has 48 divisors (see below), whose sum is σ = 2855977514208. Its totient is φ = 369369858240.

The previous prime is 1212221201011. The next prime is 1212221201047. The reversal of 1212221201022 is 2201021222121.

It is a happy number.

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 = 1212221200986 and 1212221201004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25123629 + ... + 25171832.

It is an arithmetic number, because the mean of its divisors is an integer number (59499531546).

Almost surely, 2^{1212221201022} is an apocalyptic number.

1212221201022 is an abundant number, since it is smaller than the sum of its proper divisors (1643756313186).

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

1212221201022 is a wasteful number, since it uses less digits than its factorization.

1212221201022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50295585 (or 50295582 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1212221201022 its reverse (2201021222121), we get a palindrome (3413242423143).

The spelling of 1212221201022 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, two hundred one thousand, twenty-two".