1200122112111 has 32 divisors (see below), whose sum is σ = 1725257096640. Its totient is φ = 737678029824.

The previous prime is 1200122112097. The next prime is 1200122112121. The reversal of 1200122112111 is 1112112210021.

It is a happy number.

It is not a de Polignac number, because 1200122112111 - 2⁶ = 1200122112047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200122112121) 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, 162857235 + ... + 162864603.

It is an arithmetic number, because the mean of its divisors is an integer number (53914284270).

Almost surely, 2^{1200122112111} is an apocalyptic number.

1200122112111 is a deficient number, since it is larger than the sum of its proper divisors (525134984529).

1200122112111 is a wasteful number, since it uses less digits than its factorization.

1200122112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11675.

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

Adding to 1200122112111 its reverse (1112112210021), we get a palindrome (2312234322132).

The spelling of 1200122112111 in words is "one trillion, two hundred billion, one hundred twenty-two million, one hundred twelve thousand, one hundred eleven".