102031320020 has 96 divisors (see below), whose sum is σ = 255779596800. Its totient is φ = 33447826944.

The previous prime is 102031320007. The next prime is 102031320037. The reversal of 102031320020 is 20023130201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 102031319977 and 102031320004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296186 + ... + 540174.

It is an arithmetic number, because the mean of its divisors is an integer number (2664370800).

Almost surely, 2^102031320020 is an apocalyptic number.

102031320020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102031320020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127889798400).

102031320020 is an abundant number, since it is smaller than the sum of its proper divisors (153748276780).

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

102031320020 is a wasteful number, since it uses less digits than its factorization.

102031320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244137 (or 244135 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 102031320020 its reverse (20023130201), we get a palindrome (122054450221).

The spelling of 102031320020 in words is "one hundred two billion, thirty-one million, three hundred twenty thousand, twenty".