405215212111 has 2 divisors, whose sum is σ = 405215212112. Its totient is φ = 405215212110.

The previous prime is 405215212097. The next prime is 405215212117. The reversal of 405215212111 is 111212512504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405215212111 - 2²⁵ = 405181657679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405215212117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202607606055 + 202607606056.

It is an arithmetic number, because the mean of its divisors is an integer number (202607606056).

Almost surely, 2^405215212111 is an apocalyptic number.

405215212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

405215212111 is an equidigital number, since it uses as much as digits as its factorization.

405215212111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 25.

Adding to 405215212111 its reverse (111212512504), we get a palindrome (516427724615).

The spelling of 405215212111 in words is "four hundred five billion, two hundred fifteen million, two hundred twelve thousand, one hundred eleven".