1201161211267 has 4 divisors (see below), whose sum is σ = 1207384844680. Its totient is φ = 1194937577856.

The previous prime is 1201161211253. The next prime is 1201161211273. The reversal of 1201161211267 is 7621121611021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1201161211267 - 2¹⁵ = 1201161178499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201161212267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3111816417 + ... + 3111816802.

It is an arithmetic number, because the mean of its divisors is an integer number (301846211170).

Almost surely, 2^{1201161211267} is an apocalyptic number.

1201161211267 is a deficient number, since it is larger than the sum of its proper divisors (6223633413).

1201161211267 is an equidigital number, since it uses as much as digits as its factorization.

1201161211267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6223633412.

The product of its (nonzero) digits is 2016, while the sum is 31.

Adding to 1201161211267 its reverse (7621121611021), we get a palindrome (8822282822288).

The spelling of 1201161211267 in words is "one trillion, two hundred one billion, one hundred sixty-one million, two hundred eleven thousand, two hundred sixty-seven".