213545122021367 has 16 divisors (see below), whose sum is σ = 225783634053120. Its totient is φ = 201407034729600.

The previous prime is 213545122021327. The next prime is 213545122021393. The reversal of 213545122021367 is 763120221545312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 213545122021367 - 2¹⁸ = 213545121759223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213545122021327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8650988 + ... + 22403790.

It is an arithmetic number, because the mean of its divisors is an integer number (14111477128320).

Almost surely, 2^{213545122021367} is an apocalyptic number.

213545122021367 is a deficient number, since it is larger than the sum of its proper divisors (12238512031753).

213545122021367 is a wasteful number, since it uses less digits than its factorization.

213545122021367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13756454.

The product of its (nonzero) digits is 604800, while the sum is 44.

Adding to 213545122021367 its reverse (763120221545312), we get a palindrome (976665343566679).

The spelling of 213545122021367 in words is "two hundred thirteen trillion, five hundred forty-five billion, one hundred twenty-two million, twenty-one thousand, three hundred sixty-seven".