102204101421 has 12 divisors (see below), whose sum is σ = 147647047548. Its totient is φ = 68127344064.

The previous prime is 102204101399. The next prime is 102204101423. The reversal of 102204101421 is 124101402201.

102204101421 is a `hidden beast` number, since 1 + 0 + 220 + 410 + 14 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8255721321 + 93948380100 = 90861^2 + 306510^2 .

It is a de Polignac number, because none of the positive numbers 2^k-102204101421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102204101394 and 102204101403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102204101423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 652360 + ... + 793713.

It is an arithmetic number, because the mean of its divisors is an integer number (12303920629).

Almost surely, 2^102204101421 is an apocalyptic number.

It is an amenable number.

102204101421 is a deficient number, since it is larger than the sum of its proper divisors (45442946127).

102204101421 is a wasteful number, since it uses less digits than its factorization.

102204101421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453932 (or 1453929 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 102204101421 its reverse (124101402201), we get a palindrome (226305503622).

The spelling of 102204101421 in words is "one hundred two billion, two hundred four million, one hundred one thousand, four hundred twenty-one".