213321410001421 has 2 divisors, whose sum is σ = 213321410001422. Its totient is φ = 213321410001420.

The previous prime is 213321410001389. The next prime is 213321410001467. The reversal of 213321410001421 is 124100014123312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170772989904196 + 42548420097225 = 13068014^2 + 6522915^2 .

It is a cyclic number.

It is not a de Polignac number, because 213321410001421 - 2⁵ = 213321410001389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213321410001481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106660705000710 + 106660705000711.

It is an arithmetic number, because the mean of its divisors is an integer number (106660705000711).

Almost surely, 2^{213321410001421} is an apocalyptic number.

It is an amenable number.

213321410001421 is a deficient number, since it is larger than the sum of its proper divisors (1).

213321410001421 is an equidigital number, since it uses as much as digits as its factorization.

213321410001421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 213321410001421 its reverse (124100014123312), we get a palindrome (337421424124733).

The spelling of 213321410001421 in words is "two hundred thirteen trillion, three hundred twenty-one billion, four hundred ten million, one thousand, four hundred twenty-one".