1122220001221 has 16 divisors (see below), whose sum is σ = 1236495845376. Its totient is φ = 1009989000000.

The previous prime is 1122220001179. The next prime is 1122220001237. The reversal of 1122220001221 is 1221000222211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1122220001221 - 2⁹ = 1122220000709 is a prime.

It is a super-2 number, since 2×1122220001221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1122220001195 and 1122220001204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122220001291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11183371 + ... + 11283271.

It is an arithmetic number, because the mean of its divisors is an integer number (77280990336).

Almost surely, 2^{1122220001221} is an apocalyptic number.

1122220001221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1122220001221 is a deficient number, since it is larger than the sum of its proper divisors (114275844155).

1122220001221 is a wasteful number, since it uses less digits than its factorization.

1122220001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110124.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1122220001221 its reverse (1221000222211), we get a palindrome (2343220223432).

The spelling of 1122220001221 in words is "one trillion, one hundred twenty-two billion, two hundred twenty million, one thousand, two hundred twenty-one".