102111020220 has 96 divisors (see below), whose sum is σ = 312828961536. Its totient is φ = 24680678400.

The previous prime is 102111020213. The next prime is 102111020239. The reversal of 102111020220 is 22020111201.

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

It is a junction number, because it is equal to n+sod(n) for n = 102111020196 and 102111020205.

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, 7126 + ... + 451965.

It is an arithmetic number, because the mean of its divisors is an integer number (3258635016).

Almost surely, 2^102111020220 is an apocalyptic number.

102111020220 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 102111020220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156414480768).

102111020220 is an abundant number, since it is smaller than the sum of its proper divisors (210717941316).

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

102111020220 is a wasteful number, since it uses less digits than its factorization.

102111020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459451 (or 459449 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102111020220 its reverse (22020111201), we get a palindrome (124131131421).

The spelling of 102111020220 in words is "one hundred two billion, one hundred eleven million, twenty thousand, two hundred twenty".