102100020220 has 36 divisors (see below), whose sum is σ = 235673853912. Its totient is φ = 37127279200.

The previous prime is 102100020193. The next prime is 102100020307. The reversal of 102100020220 is 22020001201.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 102100020197 and 102100020206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21092626 + ... + 21097465.

It is an arithmetic number, because the mean of its divisors is an integer number (6546495942).

Almost surely, 2^102100020220 is an apocalyptic number.

102100020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102100020220 is an abundant number, since it is smaller than the sum of its proper divisors (133573833692).

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

102100020220 is a wasteful number, since it uses less digits than its factorization.

102100020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42190122 (or 42190109 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 102100020220 its reverse (22020001201), we get a palindrome (124120021421).

The spelling of 102100020220 in words is "one hundred two billion, one hundred million, twenty thousand, two hundred twenty".