1021122001213 has 2 divisors, whose sum is σ = 1021122001214. Its totient is φ = 1021122001212.

The previous prime is 1021122001171. The next prime is 1021122001261. The reversal of 1021122001213 is 3121002211201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 999306120409 + 21815880804 = 999653^2 + 147702^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021122001213 is a prime.

It is a super-2 number, since 2×1021122001213² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021122001283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510561000606 + 510561000607.

It is an arithmetic number, because the mean of its divisors is an integer number (510561000607).

Almost surely, 2^{1021122001213} is an apocalyptic number.

It is an amenable number.

1021122001213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021122001213 is an equidigital number, since it uses as much as digits as its factorization.

1021122001213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1021122001213 its reverse (3121002211201), we get a palindrome (4142124212414).

The spelling of 1021122001213 in words is "one trillion, twenty-one billion, one hundred twenty-two million, one thousand, two hundred thirteen".