1200121200111 has 32 divisors (see below), whose sum is σ = 1671863132160. Its totient is φ = 764784889344.

The previous prime is 1200121200079. The next prime is 1200121200119. The reversal of 1200121200111 is 1110021210021.

It is not a de Polignac number, because 1200121200111 - 2⁵ = 1200121200079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200121200119) 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, 37414066 + ... + 37446128.

It is an arithmetic number, because the mean of its divisors is an integer number (52245722880).

Almost surely, 2^{1200121200111} is an apocalyptic number.

1200121200111 is a deficient number, since it is larger than the sum of its proper divisors (471741932049).

1200121200111 is a wasteful number, since it uses less digits than its factorization.

1200121200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36375.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1200121200111 its reverse (1110021210021), we get a palindrome (2310142410132).

The spelling of 1200121200111 in words is "one trillion, two hundred billion, one hundred twenty-one million, two hundred thousand, one hundred eleven".