1201121112111 has 4 divisors (see below), whose sum is σ = 1601494816152. Its totient is φ = 800747408072.

The previous prime is 1201121112089. The next prime is 1201121112133. The reversal of 1201121112111 is 1112111211021.

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

It is an interprime number because it is at equal distance from previous prime (1201121112089) and next prime (1201121112133).

It is a cyclic number.

It is not a de Polignac number, because 1201121112111 - 2²⁷ = 1200986894383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201121112181) 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, 200186852016 + ... + 200186852021.

It is an arithmetic number, because the mean of its divisors is an integer number (400373704038).

Almost surely, 2^{1201121112111} is an apocalyptic number.

1201121112111 is a deficient number, since it is larger than the sum of its proper divisors (400373704041).

1201121112111 is an equidigital number, since it uses as much as digits as its factorization.

1201121112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400373704040.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1201121112111 its reverse (1112111211021), we get a palindrome (2313232323132).

The spelling of 1201121112111 in words is "one trillion, two hundred one billion, one hundred twenty-one million, one hundred twelve thousand, one hundred eleven".