102111121 has 4 divisors (see below), whose sum is σ = 116698432. Its totient is φ = 87523812.

The previous prime is 102111103. The next prime is 102111151. The reversal of 102111121 is 121111201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102111121 - 2¹³ = 102102929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102111098 and 102111107.

It is not an unprimeable number, because it can be changed into a prime (102111151) 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, 7293645 + ... + 7293658.

It is an arithmetic number, because the mean of its divisors is an integer number (29174608).

Almost surely, 2^102111121 is an apocalyptic number.

It is an amenable number.

102111121 is a deficient number, since it is larger than the sum of its proper divisors (14587311).

102111121 is an equidigital number, since it uses as much as digits as its factorization.

102111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14587310.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 102111121 is about 10105.0047501226. The cubic root of 102111121 is about 467.4024824481.

Adding to 102111121 its reverse (121111201), we get a palindrome (223222322).

The spelling of 102111121 in words is "one hundred two million, one hundred eleven thousand, one hundred twenty-one".