102021021223 has 4 divisors (see below), whose sum is σ = 111295659528. Its totient is φ = 92746382920.

The previous prime is 102021021217. The next prime is 102021021233. The reversal of 102021021223 is 322120120201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102021021223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102021021197 and 102021021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021021233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4637319136 + ... + 4637319157.

It is an arithmetic number, because the mean of its divisors is an integer number (27823914882).

Almost surely, 2^102021021223 is an apocalyptic number.

102021021223 is a deficient number, since it is larger than the sum of its proper divisors (9274638305).

102021021223 is an equidigital number, since it uses as much as digits as its factorization.

102021021223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9274638304.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 102021021223 its reverse (322120120201), we get a palindrome (424141141424).

The spelling of 102021021223 in words is "one hundred two billion, twenty-one million, twenty-one thousand, two hundred twenty-three".