2130123421 has 8 divisors (see below), whose sum is σ = 2252031200. Its totient is φ = 2009195280.

The previous prime is 2130123361. The next prime is 2130123427. The reversal of 2130123421 is 1243210312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2130123421 - 2¹¹ = 2130121373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130123427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240435 + ... + 249136.

It is an arithmetic number, because the mean of its divisors is an integer number (281503900).

Almost surely, 2^2130123421 is an apocalyptic number.

It is an amenable number.

2130123421 is a deficient number, since it is larger than the sum of its proper divisors (121907779).

2130123421 is a wasteful number, since it uses less digits than its factorization.

2130123421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489819.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2130123421 is about 46153.2601340360. The cubic root of 2130123421 is about 1286.6732019842.

Adding to 2130123421 its reverse (1243210312), we get a palindrome (3373333733).

The spelling of 2130123421 in words is "two billion, one hundred thirty million, one hundred twenty-three thousand, four hundred twenty-one".