1201110122211 has 4 divisors (see below), whose sum is σ = 1601480162952. Its totient is φ = 800740081472.

The previous prime is 1201110122207. The next prime is 1201110122231. The reversal of 1201110122211 is 1122210111021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1201110122211 - 2² = 1201110122207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201110122231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200185020366 + ... + 200185020371.

It is an arithmetic number, because the mean of its divisors is an integer number (400370040738).

Almost surely, 2^{1201110122211} is an apocalyptic number.

1201110122211 is a deficient number, since it is larger than the sum of its proper divisors (400370040741).

1201110122211 is an equidigital number, since it uses as much as digits as its factorization.

1201110122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400370040740.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1201110122211 its reverse (1122210111021), we get a palindrome (2323320233232).

The spelling of 1201110122211 in words is "one trillion, two hundred one billion, one hundred ten million, one hundred twenty-two thousand, two hundred eleven".