2421221403 has 16 divisors (see below), whose sum is σ = 3299028480. Its totient is φ = 1578823776.

The previous prime is 2421221399. The next prime is 2421221423. The reversal of 2421221403 is 3041221242.

It is not a de Polignac number, because 2421221403 - 2² = 2421221399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2421221403.

It is not an unprimeable number, because it can be changed into a prime (2421221423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274701 + ... + 283377.

It is an arithmetic number, because the mean of its divisors is an integer number (206189280).

Almost surely, 2^2421221403 is an apocalyptic number.

2421221403 is a deficient number, since it is larger than the sum of its proper divisors (877807077).

2421221403 is a wasteful number, since it uses less digits than its factorization.

2421221403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10706.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2421221403 is about 49205.9082123275. The cubic root of 2421221403 is about 1342.8005221061.

Adding to 2421221403 its reverse (3041221242), we get a palindrome (5462442645).

The spelling of 2421221403 in words is "two billion, four hundred twenty-one million, two hundred twenty-one thousand, four hundred three".