1211100241 has 8 divisors (see below), whose sum is σ = 1323729344. Its totient is φ = 1101252240.

The previous prime is 1211100239. The next prime is 1211100251. The reversal of 1211100241 is 1420011121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211100241 - 2¹ = 1211100239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211100211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 694365 + ... + 696106.

It is an arithmetic number, because the mean of its divisors is an integer number (165466168).

Almost surely, 2^1211100241 is an apocalyptic number.

It is an amenable number.

1211100241 is a deficient number, since it is larger than the sum of its proper divisors (112629103).

1211100241 is a wasteful number, since it uses less digits than its factorization.

1211100241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390551.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1211100241 is about 34800.8655208459. The cubic root of 1211100241 is about 1065.9251194370.

Adding to 1211100241 its reverse (1420011121), we get a palindrome (2631111362).

It can be divided in two parts, 121110024 and 1, that added together give a square (121110025 = 11005²).

The spelling of 1211100241 in words is "one billion, two hundred eleven million, one hundred thousand, two hundred forty-one".