1211120221201 has 32 divisors (see below), whose sum is σ = 1405972339200. Its totient is φ = 1034635536640.

The previous prime is 1211120221193. The next prime is 1211120221211. The reversal of 1211120221201 is 1021220211121.

It is not a de Polignac number, because 1211120221201 - 2³ = 1211120221193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211120221211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35272920 + ... + 35307238.

It is an arithmetic number, because the mean of its divisors is an integer number (43936635600).

Almost surely, 2^{1211120221201} is an apocalyptic number.

1211120221201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211120221201 is a deficient number, since it is larger than the sum of its proper divisors (194852117999).

1211120221201 is an equidigital number, since it uses as much as digits as its factorization.

1211120221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35034 (or 35000 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1211120221201 its reverse (1021220211121), we get a palindrome (2232340432322).

The spelling of 1211120221201 in words is "one trillion, two hundred eleven billion, one hundred twenty million, two hundred twenty-one thousand, two hundred one".