1211152203 has 8 divisors (see below), whose sum is σ = 1794299600. Its totient is φ = 807434784.

The previous prime is 1211152171. The next prime is 1211152223. The reversal of 1211152203 is 3022511121.

It is not a de Polignac number, because 1211152203 - 2⁵ = 1211152171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211152223) 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, 22428718 + ... + 22428771.

It is an arithmetic number, because the mean of its divisors is an integer number (224287450).

Almost surely, 2^1211152203 is an apocalyptic number.

1211152203 is a deficient number, since it is larger than the sum of its proper divisors (583147397).

1211152203 is an equidigital number, since it uses as much as digits as its factorization.

1211152203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44857498 (or 44857492 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1211152203 is about 34801.6120747301. The cubic root of 1211152203 is about 1065.9403636497.

Adding to 1211152203 its reverse (3022511121), we get a palindrome (4233663324).

The spelling of 1211152203 in words is "one billion, two hundred eleven million, one hundred fifty-two thousand, two hundred three".