1121001213 has 16 divisors (see below), whose sum is σ = 1552110336. Its totient is φ = 719112960.

The previous prime is 1121001151. The next prime is 1121001227. The reversal of 1121001213 is 3121001211.

It is not a de Polignac number, because 1121001213 - 2⁶ = 1121001149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121001313) 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 15 ways as a sum of consecutive naturals, for example, 53445 + ... + 71402.

It is an arithmetic number, because the mean of its divisors is an integer number (97006896).

Almost surely, 2^1121001213 is an apocalyptic number.

It is an amenable number.

1121001213 is a deficient number, since it is larger than the sum of its proper divisors (431109123).

1121001213 is a wasteful number, since it uses less digits than its factorization.

1121001213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124964.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1121001213 is about 33481.3562001302. The cubic root of 1121001213 is about 1038.8081801458.

Adding to 1121001213 its reverse (3121001211), we get a palindrome (4242002424).

The spelling of 1121001213 in words is "one billion, one hundred twenty-one million, one thousand, two hundred thirteen".