102002143221 has 12 divisors (see below), whose sum is σ = 160730650080. Its totient is φ = 61819480680.

The previous prime is 102002143219. The next prime is 102002143247. The reversal of 102002143221 is 122341200201.

It is a happy number.

102002143221 is a `hidden beast` number, since 10 + 200 + 2 + 1 + 432 + 21 = 666.

It is not a de Polignac number, because 102002143221 - 2¹ = 102002143219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102002143194 and 102002143203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102002148221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 515162241 + ... + 515162438.

It is an arithmetic number, because the mean of its divisors is an integer number (13394220840).

Almost surely, 2^102002143221 is an apocalyptic number.

102002143221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102002143221 is a deficient number, since it is larger than the sum of its proper divisors (58728506859).

102002143221 is a wasteful number, since it uses less digits than its factorization.

102002143221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030324696 (or 1030324693 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 102002143221 its reverse (122341200201), we get a palindrome (224343343422).

The spelling of 102002143221 in words is "one hundred two billion, two million, one hundred forty-three thousand, two hundred twenty-one".