1421213123 has 12 divisors (see below), whose sum is σ = 1563345840. Its totient is φ = 1291031280.

The previous prime is 1421213113. The next prime is 1421213191. The reversal of 1421213123 is 3213121241.

It is a de Polignac number, because none of the positive numbers 2^k-1421213123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1421213095 and 1421213104.

It is not an unprimeable number, because it can be changed into a prime (1421213113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 190793 + ... + 198101.

It is an arithmetic number, because the mean of its divisors is an integer number (130278820).

Almost surely, 2^1421213123 is an apocalyptic number.

1421213123 is a deficient number, since it is larger than the sum of its proper divisors (142132717).

1421213123 is a wasteful number, since it uses less digits than its factorization.

1421213123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8938 (or 8927 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 1421213123 is about 37698.9803973529. The cubic root of 1421213123 is about 1124.3108531255.

Adding to 1421213123 its reverse (3213121241), we get a palindrome (4634334364).

The spelling of 1421213123 in words is "one billion, four hundred twenty-one million, two hundred thirteen thousand, one hundred twenty-three".