102102005100 has 72 divisors (see below), whose sum is σ = 312792511248. Its totient is φ = 25625600000.

The previous prime is 102102005059. The next prime is 102102005101. The reversal of 102102005100 is 1500201201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (102102005101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10004901 + ... + 10015100.

It is an arithmetic number, because the mean of its divisors is an integer number (4344340434).

Almost surely, 2^102102005100 is an apocalyptic number.

102102005100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102102005100 is an abundant number, since it is smaller than the sum of its proper divisors (210690506148).

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

102102005100 is a wasteful number, since it uses less digits than its factorization.

102102005100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20020035 (or 20020028 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 12.

Adding to 102102005100 its reverse (1500201201), we get a palindrome (103602206301).

The spelling of 102102005100 in words is "one hundred two billion, one hundred two million, five thousand, one hundred".