1201222111001 has 8 divisors (see below), whose sum is σ = 1310437462464. Its totient is φ = 1092008983120.

The previous prime is 1201222110961. The next prime is 1201222111007. The reversal of 1201222111001 is 1001112221021.

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

It is not a de Polignac number, because 1201222111001 - 2³⁰ = 1200148369177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201222111007) 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 7 ways as a sum of consecutive naturals, for example, 696311 + ... + 1699203.

It is an arithmetic number, because the mean of its divisors is an integer number (163804682808).

Almost surely, 2^{1201222111001} is an apocalyptic number.

1201222111001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201222111001 is a deficient number, since it is larger than the sum of its proper divisors (109215351463).

1201222111001 is a wasteful number, since it uses less digits than its factorization.

1201222111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111791.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1201222111001 its reverse (1001112221021), we get a palindrome (2202334332022).

The spelling of 1201222111001 in words is "one trillion, two hundred one billion, two hundred twenty-two million, one hundred eleven thousand, one".