102002023221 has 64 divisors (see below), whose sum is σ = 165726498816. Its totient is φ = 54475545600.

The previous prime is 102002023183. The next prime is 102002023223. The reversal of 102002023221 is 122320200201.

It is a happy number.

It is not a de Polignac number, because 102002023221 - 2⁶ = 102002023157 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 102002023221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102002023223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40750656 + ... + 40753158.

It is an arithmetic number, because the mean of its divisors is an integer number (2589476544).

Almost surely, 2^102002023221 is an apocalyptic number.

It is an amenable number.

102002023221 is a deficient number, since it is larger than the sum of its proper divisors (63724475595).

102002023221 is a wasteful number, since it uses less digits than its factorization.

102002023221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3282.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 102002023221 its reverse (122320200201), we get a palindrome (224322223422).

The spelling of 102002023221 in words is "one hundred two billion, two million, twenty-three thousand, two hundred twenty-one".