102111057 has 16 divisors (see below), whose sum is σ = 151634880. Its totient is φ = 67912416.

The previous prime is 102111049. The next prime is 102111071. The reversal of 102111057 is 750111201.

It is a happy number.

It is not a de Polignac number, because 102111057 - 2³ = 102111049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102111047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7693 + ... + 16229.

It is an arithmetic number, because the mean of its divisors is an integer number (9477180).

Almost surely, 2^102111057 is an apocalyptic number.

It is an amenable number.

102111057 is a deficient number, since it is larger than the sum of its proper divisors (49523823).

102111057 is an equidigital number, since it uses as much as digits as its factorization.

102111057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8989 (or 8983 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 102111057 is about 10105.0015833744. The cubic root of 102111057 is about 467.4023847970.

Adding to 102111057 its reverse (750111201), we get a palindrome (852222258).

The spelling of 102111057 in words is "one hundred two million, one hundred eleven thousand, fifty-seven".