6111111142121 has 2 divisors, whose sum is σ = 6111111142122. Its totient is φ = 6111111142120.

The previous prime is 6111111142063. The next prime is 6111111142217. The reversal of 6111111142121 is 1212411111116.

It is a m-pointer prime, because the next prime (6111111142217) can be obtained adding 6111111142121 to its product of digits (96).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4970937793600 + 1140173348521 = 2229560^2 + 1067789^2 .

It is a cyclic number.

It is not a de Polignac number, because 6111111142121 - 2⁶ = 6111111142057 is a prime.

It is not a weakly prime, because it can be changed into another prime (6111111142921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3055555571060 + 3055555571061.

It is an arithmetic number, because the mean of its divisors is an integer number (3055555571061).

Almost surely, 2^{6111111142121} is an apocalyptic number.

It is an amenable number.

6111111142121 is a deficient number, since it is larger than the sum of its proper divisors (1).

6111111142121 is an equidigital number, since it uses as much as digits as its factorization.

6111111142121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 23.

Adding to 6111111142121 its reverse (1212411111116), we get a palindrome (7323522253237).

The spelling of 6111111142121 in words is "six trillion, one hundred eleven billion, one hundred eleven million, one hundred forty-two thousand, one hundred twenty-one".