1201021202221 has 8 divisors (see below), whose sum is σ = 1271732233464. Its totient is φ = 1130317140480.

The previous prime is 1201021202203. The next prime is 1201021202257. The reversal of 1201021202221 is 1222021201021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 105358668100 + 1095662534121 = 324590^2 + 1046739^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1201021202221 - 2¹⁷ = 1201021071149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201021202195 and 1201021202204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201021202021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1385490 + ... + 2078851.

It is an arithmetic number, because the mean of its divisors is an integer number (158966529183).

Almost surely, 2^{1201021202221} is an apocalyptic number.

It is an amenable number.

1201021202221 is a deficient number, since it is larger than the sum of its proper divisors (70711031243).

1201021202221 is a wasteful number, since it uses less digits than its factorization.

1201021202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3484751.

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

Adding to 1201021202221 its reverse (1222021201021), we get a palindrome (2423042403242).

The spelling of 1201021202221 in words is "one trillion, two hundred one billion, twenty-one million, two hundred two thousand, two hundred twenty-one".