102111031 has 8 divisors (see below), whose sum is σ = 111896064. Its totient is φ = 92409720.

The previous prime is 102111029. The next prime is 102111047. The reversal of 102111031 is 130111201.

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 102111031 - 2¹ = 102111029 is a prime.

It is a super-2 number, since 2×102111031² = 20853325303765922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102110999 and 102111017.

It is a congruent 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, 18361 + ... + 23266.

It is an arithmetic number, because the mean of its divisors is an integer number (13987008).

Almost surely, 2^102111031 is an apocalyptic number.

102111031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

102111031 is a deficient number, since it is larger than the sum of its proper divisors (9785033).

102111031 is a wasteful number, since it uses less digits than its factorization.

102111031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41861.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 102111031 is about 10105.0002968827. Note that the first 3 decimals coincide. The cubic root of 102111031 is about 467.4023451263.

Adding to 102111031 its reverse (130111201), we get a palindrome (232222232).

The spelling of 102111031 in words is "one hundred two million, one hundred eleven thousand, thirty-one".