102111091 has 8 divisors (see below), whose sum is σ = 103260960. Its totient is φ = 100965312.

The previous prime is 102111071. The next prime is 102111103. The reversal of 102111091 is 190111201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102111091 - 2²³ = 93722483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102111071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103386 + ... + 104368.

It is an arithmetic number, because the mean of its divisors is an integer number (12907620).

Almost surely, 2^102111091 is an apocalyptic number.

102111091 is a deficient number, since it is larger than the sum of its proper divisors (1149869).

102111091 is an equidigital number, since it uses as much as digits as its factorization.

102111091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045.

The product of its (nonzero) digits is 18, while the sum is 16.

The square root of 102111091 is about 10105.0032657095. The cubic root of 102111091 is about 467.4024366741.

Adding to 102111091 its reverse (190111201), we get a palindrome (292222292).

It can be divided in two parts, 1021110 and 91, that added together give a palindrome (1021201).

The spelling of 102111091 in words is "one hundred two million, one hundred eleven thousand, ninety-one".