7212321415913 has 2 divisors, whose sum is σ = 7212321415914. Its totient is φ = 7212321415912.

The previous prime is 7212321415879. The next prime is 7212321415919. The reversal of 7212321415913 is 3195141232127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7129369927744 + 82951488169 = 2670088^2 + 288013^2 .

It is a cyclic number.

It is not a de Polignac number, because 7212321415913 - 2¹⁴ = 7212321399529 is a prime.

It is a super-2 number, since 2×7212321415913² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7212321415919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3606160707956 + 3606160707957.

It is an arithmetic number, because the mean of its divisors is an integer number (3606160707957).

Almost surely, 2^{7212321415913} is an apocalyptic number.

It is an amenable number.

7212321415913 is a deficient number, since it is larger than the sum of its proper divisors (1).

7212321415913 is an equidigital number, since it uses as much as digits as its factorization.

7212321415913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The spelling of 7212321415913 in words is "seven trillion, two hundred twelve billion, three hundred twenty-one million, four hundred fifteen thousand, nine hundred thirteen".