1121000021213 has 2 divisors, whose sum is σ = 1121000021214. Its totient is φ = 1121000021212.

The previous prime is 1121000021161. The next prime is 1121000021243. The reversal of 1121000021213 is 3121200001211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1120627608409 + 372412804 = 1058597^2 + 19298^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121000021213 - 2⁶ = 1121000021149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121000021243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560500010606 + 560500010607.

It is an arithmetic number, because the mean of its divisors is an integer number (560500010607).

Almost surely, 2^{1121000021213} is an apocalyptic number.

It is an amenable number.

1121000021213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121000021213 is an equidigital number, since it uses as much as digits as its factorization.

1121000021213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1121000021213 its reverse (3121200001211), we get a palindrome (4242200022424).

The spelling of 1121000021213 in words is "one trillion, one hundred twenty-one billion, twenty-one thousand, two hundred thirteen".