213112021523 has 2 divisors, whose sum is σ = 213112021524. Its totient is φ = 213112021522.

The previous prime is 213112021459. The next prime is 213112021583. The reversal of 213112021523 is 325120211312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213112021523 - 2⁶ = 213112021459 is a prime.

It is not a weakly prime, because it can be changed into another prime (213112021583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106556010761 + 106556010762.

It is an arithmetic number, because the mean of its divisors is an integer number (106556010762).

Almost surely, 2^213112021523 is an apocalyptic number.

213112021523 is a deficient number, since it is larger than the sum of its proper divisors (1).

213112021523 is an equidigital number, since it uses as much as digits as its factorization.

213112021523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 213112021523 its reverse (325120211312), we get a palindrome (538232232835).

The spelling of 213112021523 in words is "two hundred thirteen billion, one hundred twelve million, twenty-one thousand, five hundred twenty-three".