1001113213 has 2 divisors, whose sum is σ = 1001113214. Its totient is φ = 1001113212.

The previous prime is 1001113103. The next prime is 1001113241. The reversal of 1001113213 is 3123111001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1000899769 + 213444 = 31637^2 + 462^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001113213 - 2²¹ = 999016061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001113193 and 1001113202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001113513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500556606 + 500556607.

It is an arithmetic number, because the mean of its divisors is an integer number (500556607).

Almost surely, 2^1001113213 is an apocalyptic number.

It is an amenable number.

1001113213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001113213 is an equidigital number, since it uses as much as digits as its factorization.

1001113213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1001113213 is about 31640.3731488742. The cubic root of 1001113213 is about 1000.3709333914.

Adding to 1001113213 its reverse (3123111001), we get a palindrome (4124224214).

The spelling of 1001113213 in words is "one billion, one million, one hundred thirteen thousand, two hundred thirteen".