102204421 has 16 divisors (see below), whose sum is σ = 114840000. Its totient is φ = 90155520.

The previous prime is 102204419. The next prime is 102204437. The reversal of 102204421 is 124402201.

It is not a de Polignac number, because 102204421 - 2¹ = 102204419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102204395 and 102204404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102204451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81205 + ... + 82453.

It is an arithmetic number, because the mean of its divisors is an integer number (7177500).

Almost surely, 2^102204421 is an apocalyptic number.

102204421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102204421 is a deficient number, since it is larger than the sum of its proper divisors (12635579).

102204421 is a wasteful number, since it uses less digits than its factorization.

102204421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 102204421 is about 10109.6202203644. The cubic root of 102204421 is about 467.5447959592.

Adding to 102204421 its reverse (124402201), we get a palindrome (226606622).

It can be divided in two parts, 10220 and 4421, that added together give a palindrome (14641).

The spelling of 102204421 in words is "one hundred two million, two hundred four thousand, four hundred twenty-one".