1201111153 has 4 divisors (see below), whose sum is σ = 1310303088. Its totient is φ = 1091919220.

The previous prime is 1201111141. The next prime is 1201111243. The reversal of 1201111153 is 3511111021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201111153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201111123) 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, 54595951 + ... + 54595972.

It is an arithmetic number, because the mean of its divisors is an integer number (327575772).

Almost surely, 2^1201111153 is an apocalyptic number.

It is an amenable number.

1201111153 is a deficient number, since it is larger than the sum of its proper divisors (109191935).

1201111153 is a wasteful number, since it uses less digits than its factorization.

1201111153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109191934.

The product of its (nonzero) digits is 30, while the sum is 16.

The square root of 1201111153 is about 34657.0505525211. The cubic root of 1201111153 is about 1062.9864614031.

Adding to 1201111153 its reverse (3511111021), we get a palindrome (4712222174).

The spelling of 1201111153 in words is "one billion, two hundred one million, one hundred eleven thousand, one hundred fifty-three".