942121111 has 2 divisors, whose sum is σ = 942121112. Its totient is φ = 942121110.

The previous prime is 942121091. The next prime is 942121127. The reversal of 942121111 is 111121249.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-942121111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (942121171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 471060555 + 471060556.

It is an arithmetic number, because the mean of its divisors is an integer number (471060556).

Almost surely, 2^942121111 is an apocalyptic number.

942121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

942121111 is an equidigital number, since it uses as much as digits as its factorization.

942121111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 22.

The square root of 942121111 is about 30693.9914478388. The cubic root of 942121111 is about 980.3223675688.

The spelling of 942121111 in words is "nine hundred forty-two million, one hundred twenty-one thousand, one hundred eleven".