1232220202121 has 4 divisors (see below), whose sum is σ = 1244420402244. Its totient is φ = 1220020002000.

The previous prime is 1232220202097. The next prime is 1232220202133. The reversal of 1232220202121 is 1212020222321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1190638874896 + 41581327225 = 1091164^2 + 203915^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232220202121 - 2¹⁴ = 1232220185737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1232220202093 and 1232220202102.

It is not an unprimeable number, because it can be changed into a prime (1232220202721) 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 3 ways as a sum of consecutive naturals, for example, 6100099910 + ... + 6100100111.

It is an arithmetic number, because the mean of its divisors is an integer number (311105100561).

Almost surely, 2^{1232220202121} is an apocalyptic number.

It is an amenable number.

1232220202121 is a deficient number, since it is larger than the sum of its proper divisors (12200200123).

1232220202121 is a wasteful number, since it uses less digits than its factorization.

1232220202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12200200122.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1232220202121 its reverse (1212020222321), we get a palindrome (2444240424442).

It can be divided in two parts, 1232220 and 202121, that added together give a palindrome (1434341).

The spelling of 1232220202121 in words is "one trillion, two hundred thirty-two billion, two hundred twenty million, two hundred two thousand, one hundred twenty-one".