1154221350211 has 4 divisors (see below), whose sum is σ = 1191454297024. Its totient is φ = 1116988403400.

The previous prime is 1154221350203. The next prime is 1154221350323. The reversal of 1154221350211 is 1120531224511.

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 1154221350211 - 2³ = 1154221350203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1154221350211.

It is not an unprimeable number, because it can be changed into a prime (1154221353211) 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, 18616473360 + ... + 18616473421.

It is an arithmetic number, because the mean of its divisors is an integer number (297863574256).

Almost surely, 2^{1154221350211} is an apocalyptic number.

1154221350211 is a deficient number, since it is larger than the sum of its proper divisors (37232946813).

1154221350211 is an equidigital number, since it uses as much as digits as its factorization.

1154221350211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37232946812.

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 1154221350211 its reverse (1120531224511), we get a palindrome (2274752574722).

The spelling of 1154221350211 in words is "one trillion, one hundred fifty-four billion, two hundred twenty-one million, three hundred fifty thousand, two hundred eleven".