1011200121111 has 32 divisors (see below), whose sum is σ = 1445209394688. Its totient is φ = 627266090880.

The previous prime is 1011200121103. The next prime is 1011200121143. The reversal of 1011200121111 is 1111210021101.

It is not a de Polignac number, because 1011200121111 - 2³ = 1011200121103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011200121161) 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, 13163265 + ... + 13239861.

It is an arithmetic number, because the mean of its divisors is an integer number (45162793584).

Almost surely, 2^{1011200121111} is an apocalyptic number.

1011200121111 is a deficient number, since it is larger than the sum of its proper divisors (434009273577).

1011200121111 is a wasteful number, since it uses less digits than its factorization.

1011200121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81831.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1011200121111 its reverse (1111210021101), we get a palindrome (2122410142212).

It can be divided in two parts, 1011200 and 121111, that added together give a palindrome (1132311).

The spelling of 1011200121111 in words is "one trillion, eleven billion, two hundred million, one hundred twenty-one thousand, one hundred eleven".