1201212112111 has 16 divisors (see below), whose sum is σ = 1355234826240. Its totient is φ = 1055247878880.

The previous prime is 1201212112099. The next prime is 1201212112117. The reversal of 1201212112111 is 1112112121021.

It is a cyclic number.

It is not a de Polignac number, because 1201212112111 - 2¹³ = 1201212103919 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 (1201212112117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14664396 + ... + 14746081.

It is an arithmetic number, because the mean of its divisors is an integer number (84702176640).

Almost surely, 2^{1201212112111} is an apocalyptic number.

1201212112111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1201212112111 is a deficient number, since it is larger than the sum of its proper divisors (154022714129).

1201212112111 is a wasteful number, since it uses less digits than its factorization.

1201212112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29410614.

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

Adding to 1201212112111 its reverse (1112112121021), we get a palindrome (2313324233132).

The spelling of 1201212112111 in words is "one trillion, two hundred one billion, two hundred twelve million, one hundred twelve thousand, one hundred eleven".