1022003123 has 4 divisors (see below), whose sum is σ = 1057244640. Its totient is φ = 986761608.

The previous prime is 1022003113. The next prime is 1022003197. The reversal of 1022003123 is 3213002201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3213002201 = 19 ⋅169105379.

It is a cyclic number.

It is not a de Polignac number, because 1022003123 - 2⁴ = 1022003107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022003098 and 1022003107.

It is not an unprimeable number, because it can be changed into a prime (1022003113) 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, 17620715 + ... + 17620772.

It is an arithmetic number, because the mean of its divisors is an integer number (264311160).

Almost surely, 2^1022003123 is an apocalyptic number.

1022003123 is a deficient number, since it is larger than the sum of its proper divisors (35241517).

1022003123 is an equidigital number, since it uses as much as digits as its factorization.

1022003123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35241516.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1022003123 is about 31968.7835708524. The cubic root of 1022003123 is about 1007.2812293578.

Adding to 1022003123 its reverse (3213002201), we get a palindrome (4235005324).

The spelling of 1022003123 in words is "one billion, twenty-two million, three thousand, one hundred twenty-three".