1201211120111 has 4 divisors (see below), whose sum is σ = 1201730902224. Its totient is φ = 1200691338000.

The previous prime is 1201211120089. The next prime is 1201211120113. The reversal of 1201211120111 is 1110211121021.

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 1201211120111 - 2³⁸ = 926333213167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201211120113) 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, 259887590 + ... + 259892211.

It is an arithmetic number, because the mean of its divisors is an integer number (300432725556).

Almost surely, 2^{1201211120111} is an apocalyptic number.

1201211120111 is a deficient number, since it is larger than the sum of its proper divisors (519782113).

1201211120111 is an equidigital number, since it uses as much as digits as its factorization.

1201211120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519782112.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1201211120111 its reverse (1110211121021), we get a palindrome (2311422241132).

The spelling of 1201211120111 in words is "one trillion, two hundred one billion, two hundred eleven million, one hundred twenty thousand, one hundred eleven".