221010302123 has 6 divisors (see below), whose sum is σ = 239318848044. Its totient is φ = 204009509496.

The previous prime is 221010302101. The next prime is 221010302143. The reversal of 221010302123 is 321203010122.

It is not a de Polignac number, because 221010302123 - 2⁸ = 221010301867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221010302143) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 653876465 + ... + 653876802.

It is an arithmetic number, because the mean of its divisors is an integer number (39886474674).

Almost surely, 2^221010302123 is an apocalyptic number.

221010302123 is a deficient number, since it is larger than the sum of its proper divisors (18308545921).

221010302123 is a wasteful number, since it uses less digits than its factorization.

221010302123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307753293 (or 1307753280 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 221010302123 its reverse (321203010122), we get a palindrome (542213312245).

The spelling of 221010302123 in words is "two hundred twenty-one billion, ten million, three hundred two thousand, one hundred twenty-three".