1201012112189 has 2 divisors, whose sum is σ = 1201012112190. Its totient is φ = 1201012112188.

The previous prime is 1201012112177. The next prime is 1201012112347. The reversal of 1201012112189 is 9812112101021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1200959549689 + 52562500 = 1095883^2 + 7250^2 .

It is an emirp because it is prime and its reverse (9812112101021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201012112189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201012112129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600506056094 + 600506056095.

It is an arithmetic number, because the mean of its divisors is an integer number (600506056095).

Almost surely, 2^{1201012112189} is an apocalyptic number.

It is an amenable number.

1201012112189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201012112189 is an equidigital number, since it uses as much as digits as its factorization.

1201012112189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 29.

The spelling of 1201012112189 in words is "one trillion, two hundred one billion, twelve million, one hundred twelve thousand, one hundred eighty-nine".