1213200021113 has 2 divisors, whose sum is σ = 1213200021114. Its totient is φ = 1213200021112.

The previous prime is 1213200021109. The next prime is 1213200021119. The reversal of 1213200021113 is 3111200023121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 958102295929 + 255097725184 = 978827^2 + 505072^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213200021113 - 2² = 1213200021109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213200021091 and 1213200021100.

It is not a weakly prime, because it can be changed into another prime (1213200021119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606600010556 + 606600010557.

It is an arithmetic number, because the mean of its divisors is an integer number (606600010557).

Almost surely, 2^{1213200021113} is an apocalyptic number.

It is an amenable number.

1213200021113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213200021113 is an equidigital number, since it uses as much as digits as its factorization.

1213200021113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1213200021113 its reverse (3111200023121), we get a palindrome (4324400044234).

The spelling of 1213200021113 in words is "one trillion, two hundred thirteen billion, two hundred million, twenty-one thousand, one hundred thirteen".