213121303807 has 2 divisors, whose sum is σ = 213121303808. Its totient is φ = 213121303806.

The previous prime is 213121303783. The next prime is 213121303849. The reversal of 213121303807 is 708303121312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213121303807 - 2⁷ = 213121303679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213121303867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106560651903 + 106560651904.

It is an arithmetic number, because the mean of its divisors is an integer number (106560651904).

Almost surely, 2^213121303807 is an apocalyptic number.

213121303807 is a deficient number, since it is larger than the sum of its proper divisors (1).

213121303807 is an equidigital number, since it uses as much as digits as its factorization.

213121303807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The spelling of 213121303807 in words is "two hundred thirteen billion, one hundred twenty-one million, three hundred three thousand, eight hundred seven".