1222201122021 has 56 divisors (see below), whose sum is σ = 2005441856256. Its totient is φ = 738359893440.

The previous prime is 1222201122007. The next prime is 1222201122073. The reversal of 1222201122021 is 1202211022221.

It is a happy number.

1222201122021 is a `hidden beast` number, since 1 + 222 + 201 + 1 + 220 + 21 = 666.

It is not a de Polignac number, because 1222201122021 - 2¹⁵ = 1222201089253 is a prime.

It is a super-2 number, since 2×1222201122021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1222201121985 and 1222201122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222201121021) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 2266476 + ... + 2753418.

Almost surely, 2^{1222201122021} is an apocalyptic number.

1222201122021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222201122021 is a deficient number, since it is larger than the sum of its proper divisors (783240734235).

1222201122021 is an equidigital number, since it uses as much as digits as its factorization.

1222201122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487285 (or 487270 counting only the distinct ones).

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

Adding to 1222201122021 its reverse (1202211022221), we get a palindrome (2424412144242).

The spelling of 1222201122021 in words is "one trillion, two hundred twenty-two billion, two hundred one million, one hundred twenty-two thousand, twenty-one".