1202012201221 has 8 divisors (see below), whose sum is σ = 1305930207960. Its totient is φ = 1099730698752.

The previous prime is 1202012201177. The next prime is 1202012201231. The reversal of 1202012201221 is 1221022102021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 221939921025 + 980072280196 = 471105^2 + 989986^2 .

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 1202012201221 - 2¹⁹ = 1202011676933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202012201195 and 1202012201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202012201231) 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, 409124536 + ... + 409127473.

It is an arithmetic number, because the mean of its divisors is an integer number (163241275995).

Almost surely, 2^{1202012201221} is an apocalyptic number.

It is an amenable number.

1202012201221 is a deficient number, since it is larger than the sum of its proper divisors (103918006739).

1202012201221 is a wasteful number, since it uses less digits than its factorization.

1202012201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818252135.

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

Adding to 1202012201221 its reverse (1221022102021), we get a palindrome (2423034303242).

The spelling of 1202012201221 in words is "one trillion, two hundred two billion, twelve million, two hundred one thousand, two hundred twenty-one".