1201221001201 has 8 divisors (see below), whose sum is σ = 1297755600680. Its totient is φ = 1105276828032.

The previous prime is 1201221001199. The next prime is 1201221001207. The reversal of 1201221001201 is 1021001221021.

It can be written as a sum of positive squares in 4 ways, for example, as 17509640976 + 1183711360225 = 132324^2 + 1087985^2 .

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

It is not a de Polignac number, because 1201221001201 - 2¹ = 1201221001199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201221001207) 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, 147602346 + ... + 147610483.

It is an arithmetic number, because the mean of its divisors is an integer number (162219450085).

Almost surely, 2^{1201221001201} is an apocalyptic number.

It is an amenable number.

1201221001201 is a deficient number, since it is larger than the sum of its proper divisors (96534599479).

1201221001201 is a wasteful number, since it uses less digits than its factorization.

1201221001201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295213155.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1201221001201 its reverse (1021001221021), we get a palindrome (2222222222222).

The spelling of 1201221001201 in words is "one trillion, two hundred one billion, two hundred twenty-one million, one thousand, two hundred one".