102111023124 has 144 divisors (see below), whose sum is σ = 298519131456. Its totient is φ = 29085772800.

The previous prime is 102111023117. The next prime is 102111023197. The reversal of 102111023124 is 421320111201.

It is a super-2 number, since 2×102111023124² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 102111023097 and 102111023106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5558194 + ... + 5576534.

It is an arithmetic number, because the mean of its divisors is an integer number (2073049524).

Almost surely, 2^102111023124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102111023124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149259565728).

102111023124 is an abundant number, since it is smaller than the sum of its proper divisors (196408108332).

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

102111023124 is a wasteful number, since it uses less digits than its factorization.

102111023124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19206 (or 19201 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 102111023124 its reverse (421320111201), we get a palindrome (523431134325).

The spelling of 102111023124 in words is "one hundred two billion, one hundred eleven million, twenty-three thousand, one hundred twenty-four".