102442111 has 4 divisors (see below), whose sum is σ = 102867424. Its totient is φ = 102016800.

The previous prime is 102442103. The next prime is 102442127. The reversal of 102442111 is 111244201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111244201 = 109 ⋅1020589.

It is a cyclic number.

It is not a de Polignac number, because 102442111 - 2³ = 102442103 is a prime.

It is a super-2 number, since 2×102442111² = 20988772212272642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102442511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212295 + ... + 212776.

It is an arithmetic number, because the mean of its divisors is an integer number (25716856).

Almost surely, 2^102442111 is an apocalyptic number.

102442111 is a deficient number, since it is larger than the sum of its proper divisors (425313).

102442111 is an equidigital number, since it uses as much as digits as its factorization.

102442111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425312.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 102442111 is about 10121.3690279527. The cubic root of 102442111 is about 467.9069612577.

Adding to 102442111 its reverse (111244201), we get a palindrome (213686312).

The spelling of 102442111 in words is "one hundred two million, four hundred forty-two thousand, one hundred eleven".