3111203212111 has 2 divisors, whose sum is σ = 3111203212112. Its totient is φ = 3111203212110.

The previous prime is 3111203212087. The next prime is 3111203212141. The reversal of 3111203212111 is 1112123021113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3111203212111 - 2¹³ = 3111203203919 is a prime.

It is a super-5 number, since 5×3111203212111⁵ (a number of 64 digits) contains 55555 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3111203212141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555601606055 + 1555601606056.

It is an arithmetic number, because the mean of its divisors is an integer number (1555601606056).

Almost surely, 2^{3111203212111} is an apocalyptic number.

3111203212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111203212111 is an equidigital number, since it uses as much as digits as its factorization.

3111203212111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 3111203212111 its reverse (1112123021113), we get a palindrome (4223326233224).

The spelling of 3111203212111 in words is "three trillion, one hundred eleven billion, two hundred three million, two hundred twelve thousand, one hundred eleven".