1201111122211 has 64 divisors (see below), whose sum is σ = 1621294940160. Its totient is φ = 859329959040.

The previous prime is 1201111122209. The next prime is 1201111122221. The reversal of 1201111122211 is 1122211111021.

It is not a de Polignac number, because 1201111122211 - 2¹ = 1201111122209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201111122221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 254308696 + ... + 254313418.

It is an arithmetic number, because the mean of its divisors is an integer number (25332733440).

Almost surely, 2^{1201111122211} is an apocalyptic number.

1201111122211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1201111122211 is a deficient number, since it is larger than the sum of its proper divisors (420183817949).

1201111122211 is a wasteful number, since it uses less digits than its factorization.

1201111122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6056.

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

Adding to 1201111122211 its reverse (1122211111021), we get a palindrome (2323322233232).

The spelling of 1201111122211 in words is "one trillion, two hundred one billion, one hundred eleven million, one hundred twenty-two thousand, two hundred eleven".