213020281391 has 2 divisors, whose sum is σ = 213020281392. Its totient is φ = 213020281390.

The previous prime is 213020281367. The next prime is 213020281423. The reversal of 213020281391 is 193182020312.

It is an a-pointer prime, because the next prime (213020281423) can be obtained adding 213020281391 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213020281391 - 2²² = 213016087087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213020283391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106510140695 + 106510140696.

It is an arithmetic number, because the mean of its divisors is an integer number (106510140696).

Almost surely, 2^213020281391 is an apocalyptic number.

213020281391 is a deficient number, since it is larger than the sum of its proper divisors (1).

213020281391 is an equidigital number, since it uses as much as digits as its factorization.

213020281391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 213020281391 in words is "two hundred thirteen billion, twenty million, two hundred eighty-one thousand, three hundred ninety-one".