1222202120121 has 24 divisors (see below), whose sum is σ = 1813176807624. Its totient is φ = 792753454080.

The previous prime is 1222202120119. The next prime is 1222202120141. The reversal of 1222202120121 is 1210212022221.

It is a happy number.

1222202120121 is a `hidden beast` number, since 1 + 222 + 202 + 120 + 121 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 304014096 + 1221898106025 = 17436^2 + 1105395^2 .

It is not a de Polignac number, because 1222202120121 - 2¹ = 1222202120119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222202120094 and 1222202120103.

It is not an unprimeable number, because it can be changed into a prime (1222202120141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18241935 + ... + 18308811.

It is an arithmetic number, because the mean of its divisors is an integer number (75549033651).

Almost surely, 2^{1222202120121} is an apocalyptic number.

It is an amenable number.

1222202120121 is a deficient number, since it is larger than the sum of its proper divisors (590974687503).

1222202120121 is a wasteful number, since it uses less digits than its factorization.

1222202120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121801 (or 121798 counting only the distinct ones).

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

Adding to 1222202120121 its reverse (1210212022221), we get a palindrome (2432414142342).

The spelling of 1222202120121 in words is "one trillion, two hundred twenty-two billion, two hundred two million, one hundred twenty thousand, one hundred twenty-one".