102111020 has 24 divisors (see below), whose sum is σ = 233927568. Its totient is φ = 37131200.

The previous prime is 102110971. The next prime is 102111029. The reversal of 102111020 is 20111201.

It is a junction number, because it is equal to n+sod(n) for n = 102110989 and 102111007.

It is not an unprimeable number, because it can be changed into a prime (102111029) 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, 231851 + ... + 232290.

It is an arithmetic number, because the mean of its divisors is an integer number (9746982).

Almost surely, 2^102111020 is an apocalyptic number.

102111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102111020 is an abundant number, since it is smaller than the sum of its proper divisors (131816548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102111020 is a wasteful number, since it uses less digits than its factorization.

102111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464161 (or 464159 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 102111020 is about 10104.9997525977. Note that the first 3 decimals coincide. The cubic root of 102111020 is about 467.4023283425.

Adding to 102111020 its reverse (20111201), we get a palindrome (122222221).

The spelling of 102111020 in words is "one hundred two million, one hundred eleven thousand, twenty".