667210212111 has 32 divisors (see below), whose sum is σ = 931169157120. Its totient is φ = 424150014464.

The previous prime is 667210212091. The next prime is 667210212133. The reversal of 667210212111 is 111212012766.

It is a cyclic number.

It is not a de Polignac number, because 667210212111 - 2¹⁵ = 667210179343 is a prime.

It is a super-2 number, since 2×667210212111² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667210212161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68943205 + ... + 68952881.

It is an arithmetic number, because the mean of its divisors is an integer number (29099036160).

Almost surely, 2^667210212111 is an apocalyptic number.

667210212111 is a deficient number, since it is larger than the sum of its proper divisors (263958945009).

667210212111 is a wasteful number, since it uses less digits than its factorization.

667210212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12695.

The product of its (nonzero) digits is 2016, while the sum is 30.

Adding to 667210212111 its reverse (111212012766), we get a palindrome (778422224877).

The spelling of 667210212111 in words is "six hundred sixty-seven billion, two hundred ten million, two hundred twelve thousand, one hundred eleven".