1211001200111 has 16 divisors (see below), whose sum is σ = 1277754102240. Its totient is φ = 1144550891520.

The previous prime is 1211001200099. The next prime is 1211001200141. The reversal of 1211001200111 is 1110021001121.

It is a cyclic number.

It is not a de Polignac number, because 1211001200111 - 2¹⁸ = 1211000937967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211001200092 and 1211001200101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211001200141) 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, 59489711 + ... + 59510063.

It is an arithmetic number, because the mean of its divisors is an integer number (79859631390).

Almost surely, 2^{1211001200111} is an apocalyptic number.

1211001200111 is a deficient number, since it is larger than the sum of its proper divisors (66752902129).

1211001200111 is a wasteful number, since it uses less digits than its factorization.

1211001200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27626.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1211001200111 its reverse (1110021001121), we get a palindrome (2321022201232).

The spelling of 1211001200111 in words is "one trillion, two hundred eleven billion, one million, two hundred thousand, one hundred eleven".