1222212201220 has 12 divisors (see below), whose sum is σ = 2566645622604. Its totient is φ = 488884880480.

The previous prime is 1222212201101. The next prime is 1222212201293. The reversal of 1222212201220 is 221022122221.

It can be written as a sum of positive squares in 2 ways, for example, as 870477804036 + 351734397184 = 932994^2 + 593072^2 .

It is a super-2 number, since 2×1222212201220² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30555305011 + ... + 30555305050.

It is an arithmetic number, because the mean of its divisors is an integer number (213887135217).

Almost surely, 2^{1222212201220} is an apocalyptic number.

1222212201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222212201220 is an abundant number, since it is smaller than the sum of its proper divisors (1344433421384).

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

1222212201220 is a wasteful number, since it uses less digits than its factorization.

1222212201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61110610070 (or 61110610068 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1222212201220 its reverse (221022122221), we get a palindrome (1443234323441).

The spelling of 1222212201220 in words is "one trillion, two hundred twenty-two billion, two hundred twelve million, two hundred one thousand, two hundred twenty".