1002123412 has 12 divisors (see below), whose sum is σ = 1856875860. Its totient is φ = 471587456.

The previous prime is 1002123389. The next prime is 1002123431. The reversal of 1002123412 is 2143212001.

It can be written as a sum of positive squares in 2 ways, for example, as 603881476 + 398241936 = 24574^2 + 19956^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7368487 + ... + 7368622.

It is an arithmetic number, because the mean of its divisors is an integer number (154739655).

Almost surely, 2^1002123412 is an apocalyptic number.

It is an amenable number.

1002123412 is a deficient number, since it is larger than the sum of its proper divisors (854752448).

1002123412 is a wasteful number, since it uses less digits than its factorization.

1002123412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14737130 (or 14737128 counting only the distinct ones).

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

The square root of 1002123412 is about 31656.3328893288. The cubic root of 1002123412 is about 1000.7073036037.

Adding to 1002123412 its reverse (2143212001), we get a palindrome (3145335413).

It can be divided in two parts, 10021 and 23412, that added together give a palindrome (33433).

The spelling of 1002123412 in words is "one billion, two million, one hundred twenty-three thousand, four hundred twelve".