1222220021121 has 12 divisors (see below), whose sum is σ = 1925922457680. Its totient is φ = 740739406680.

The previous prime is 1222220021119. The next prime is 1222220021149. The reversal of 1222220021121 is 1211200222221.

It is a happy number.

1222220021121 is a `hidden beast` number, since 12 + 222 + 200 + 211 + 21 = 666.

It is not a de Polignac number, because 1222220021121 - 2¹ = 1222220021119 is a prime.

It is a super-3 number, since 3×1222220021121³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1222220021094 and 1222220021103.

It is not an unprimeable number, because it can be changed into a prime (1222220021111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6172828291 + ... + 6172828488.

It is an arithmetic number, because the mean of its divisors is an integer number (160493538140).

Almost surely, 2^{1222220021121} is an apocalyptic number.

1222220021121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222220021121 is a deficient number, since it is larger than the sum of its proper divisors (703702436559).

1222220021121 is a wasteful number, since it uses less digits than its factorization.

1222220021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12345656796 (or 12345656793 counting only the distinct ones).

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

Adding to 1222220021121 its reverse (1211200222221), we get a palindrome (2433420243342).

The spelling of 1222220021121 in words is "one trillion, two hundred twenty-two billion, two hundred twenty million, twenty-one thousand, one hundred twenty-one".