1002221123 has 4 divisors (see below), whose sum is σ = 1002284448. Its totient is φ = 1002157800.

The previous prime is 1002221119. The next prime is 1002221137. The reversal of 1002221123 is 3211222001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3211222001 = 13 ⋅247017077.

It is a cyclic number.

It is not a de Polignac number, because 1002221123 - 2² = 1002221119 is a prime.

It is a super-2 number, since 2×1002221123² = 2008894358774762258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002221098 and 1002221107.

It is not an unprimeable number, because it can be changed into a prime (1002221173) 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, 15065 + ... + 47237.

It is an arithmetic number, because the mean of its divisors is an integer number (250571112).

Almost surely, 2^1002221123 is an apocalyptic number.

1002221123 is a deficient number, since it is larger than the sum of its proper divisors (63325).

1002221123 is an equidigital number, since it uses as much as digits as its factorization.

1002221123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63324.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1002221123 is about 31657.8761606018. The cubic root of 1002221123 is about 1000.7398268546.

Adding to 1002221123 its reverse (3211222001), we get a palindrome (4213443124).

The spelling of 1002221123 in words is "one billion, two million, two hundred twenty-one thousand, one hundred twenty-three".