1201222021001 has 4 divisors (see below), whose sum is σ = 1201390526100. Its totient is φ = 1201053515904.

The previous prime is 1201222020997. The next prime is 1201222021033. The reversal of 1201222021001 is 1001202221021.

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 1010877419776 + 190344601225 = 1005424^2 + 436285^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201222021001 - 2² = 1201222020997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201222021201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84241856 + ... + 84256113.

It is an arithmetic number, because the mean of its divisors is an integer number (300347631525).

Almost surely, 2^{1201222021001} is an apocalyptic number.

It is an amenable number.

1201222021001 is a deficient number, since it is larger than the sum of its proper divisors (168505099).

1201222021001 is an equidigital number, since it uses as much as digits as its factorization.

1201222021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168505098.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1201222021001 its reverse (1001202221021), we get a palindrome (2202424242022).

The spelling of 1201222021001 in words is "one trillion, two hundred one billion, two hundred twenty-two million, twenty-one thousand, one".