221002131023 has 16 divisors (see below), whose sum is σ = 226404136800. Its totient is φ = 215664024576.

The previous prime is 221002131019. The next prime is 221002131073. The reversal of 221002131023 is 320131200122.

It is a cyclic number.

It is not a de Polignac number, because 221002131023 - 2² = 221002131019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221002130992 and 221002131010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002131073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16929803 + ... + 16942851.

It is an arithmetic number, because the mean of its divisors is an integer number (14150258550).

Almost surely, 2^221002131023 is an apocalyptic number.

221002131023 is a deficient number, since it is larger than the sum of its proper divisors (5402005777).

221002131023 is a wasteful number, since it uses less digits than its factorization.

221002131023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15466.

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

Adding to 221002131023 its reverse (320131200122), we get a palindrome (541133331145).

The spelling of 221002131023 in words is "two hundred twenty-one billion, two million, one hundred thirty-one thousand, twenty-three".