1151121213 has 80 divisors (see below), whose sum is σ = 1997835840. Its totient is φ = 653184000.

The previous prime is 1151121131. The next prime is 1151121217. The reversal of 1151121213 is 3121211511.

It is not a de Polignac number, because 1151121213 - 2⁹ = 1151120701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151121217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1641763 + ... + 1642463.

It is an arithmetic number, because the mean of its divisors is an integer number (24972948).

Almost surely, 2^1151121213 is an apocalyptic number.

It is an amenable number.

1151121213 is a deficient number, since it is larger than the sum of its proper divisors (846714627).

1151121213 is a wasteful number, since it uses less digits than its factorization.

1151121213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840 (or 831 counting only the distinct ones).

The product of its digits is 60, while the sum is 18.

The square root of 1151121213 is about 33928.1772719962. The cubic root of 1151121213 is about 1048.0299304453.

Adding to 1151121213 its reverse (3121211511), we get a palindrome (4272332724).

The spelling of 1151121213 in words is "one billion, one hundred fifty-one million, one hundred twenty-one thousand, two hundred thirteen".