213319201421 has 2 divisors, whose sum is σ = 213319201422. Its totient is φ = 213319201420.

The previous prime is 213319201397. The next prime is 213319201483. The reversal of 213319201421 is 124102913312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190680688900 + 22638512521 = 436670^2 + 150461^2 .

It is a cyclic number.

It is not a de Polignac number, because 213319201421 - 2⁶ = 213319201357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213319201021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106659600710 + 106659600711.

It is an arithmetic number, because the mean of its divisors is an integer number (106659600711).

Almost surely, 2^213319201421 is an apocalyptic number.

It is an amenable number.

213319201421 is a deficient number, since it is larger than the sum of its proper divisors (1).

213319201421 is an equidigital number, since it uses as much as digits as its factorization.

213319201421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 213319201421 in words is "two hundred thirteen billion, three hundred nineteen million, two hundred one thousand, four hundred twenty-one".