1201222001001 has 16 divisors (see below), whose sum is σ = 1839191581440. Its totient is φ = 689696842320.

The previous prime is 1201222000949. The next prime is 1201222001059. The reversal of 1201222001001 is 1001002221021.

It is not a de Polignac number, because 1201222001001 - 2²⁹ = 1200685130089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201222001071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 957911655 + ... + 957912908.

It is an arithmetic number, because the mean of its divisors is an integer number (114949473840).

Almost surely, 2^{1201222001001} is an apocalyptic number.

1201222001001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201222001001 is a deficient number, since it is larger than the sum of its proper divisors (637969580439).

1201222001001 is a wasteful number, since it uses less digits than its factorization.

1201222001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915824596.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1201222001001 its reverse (1001002221021), we get a palindrome (2202224222022).

The spelling of 1201222001001 in words is "one trillion, two hundred one billion, two hundred twenty-two million, one thousand, one".