1042121111 has 2 divisors, whose sum is σ = 1042121112. Its totient is φ = 1042121110.

The previous prime is 1042121077. The next prime is 1042121117. The reversal of 1042121111 is 1111212401.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1042121111 - 2¹⁸ = 1041858967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042121117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521060555 + 521060556.

It is an arithmetic number, because the mean of its divisors is an integer number (521060556).

Almost surely, 2^1042121111 is an apocalyptic number.

1042121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042121111 is an equidigital number, since it uses as much as digits as its factorization.

1042121111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 1042121111 is about 32281.9006720484. The cubic root of 1042121111 is about 1013.8477256824.

Adding to 1042121111 its reverse (1111212401), we get a palindrome (2153333512).

The spelling of 1042121111 in words is "one billion, forty-two million, one hundred twenty-one thousand, one hundred eleven".