1213320302021 has 2 divisors, whose sum is σ = 1213320302022. Its totient is φ = 1213320302020.

The previous prime is 1213320301969. The next prime is 1213320302057. The reversal of 1213320302021 is 1202030233121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 736687473025 + 476632828996 = 858305^2 + 690386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213320302021 - 2⁶ = 1213320301957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213320301984 and 1213320302002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213320302071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606660151010 + 606660151011.

It is an arithmetic number, because the mean of its divisors is an integer number (606660151011).

Almost surely, 2^{1213320302021} is an apocalyptic number.

It is an amenable number.

1213320302021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213320302021 is an equidigital number, since it uses as much as digits as its factorization.

1213320302021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1213320302021 its reverse (1202030233121), we get a palindrome (2415350535142).

The spelling of 1213320302021 in words is "one trillion, two hundred thirteen billion, three hundred twenty million, three hundred two thousand, twenty-one".