1211120222001 has 16 divisors (see below), whose sum is σ = 1745758881600. Its totient is φ = 744244573248.

The previous prime is 1211120221981. The next prime is 1211120222003. The reversal of 1211120222001 is 1002220211121.

It is not a de Polignac number, because 1211120222001 - 2¹⁰ = 1211120220977 is a prime.

It is a super-3 number, since 3×1211120222001³ (a number of 37 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1211120222003) 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, 287129286 + ... + 287133503.

It is an arithmetic number, because the mean of its divisors is an integer number (109109930100).

Almost surely, 2^{1211120222001} is an apocalyptic number.

It is an amenable number.

1211120222001 is a deficient number, since it is larger than the sum of its proper divisors (534638659599).

1211120222001 is a wasteful number, since it uses less digits than its factorization.

1211120222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574262848.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1211120222001 its reverse (1002220211121), we get a palindrome (2213340433122).

The spelling of 1211120222001 in words is "one trillion, two hundred eleven billion, one hundred twenty million, two hundred twenty-two thousand, one".