102205030420 has 24 divisors (see below), whose sum is σ = 219865457448. Its totient is φ = 39884889600.

The previous prime is 102205030391. The next prime is 102205030427. The reversal of 102205030420 is 24030502201.

It can be written as a sum of positive squares in 4 ways, for example, as 13218560784 + 88986469636 = 114972^2 + 298306^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102205030427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62319321 + ... + 62320960.

It is an arithmetic number, because the mean of its divisors is an integer number (9161060727).

Almost surely, 2^102205030420 is an apocalyptic number.

102205030420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102205030420 is an abundant number, since it is smaller than the sum of its proper divisors (117660427028).

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

102205030420 is a wasteful number, since it uses less digits than its factorization.

102205030420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124640331 (or 124640329 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

Adding to 102205030420 its reverse (24030502201), we get a palindrome (126235532621).

The spelling of 102205030420 in words is "one hundred two billion, two hundred five million, thirty thousand, four hundred twenty".