2421220402 has 8 divisors (see below), whose sum is σ = 3654963756. Its totient is φ = 1202899152.

The previous prime is 2421220397. The next prime is 2421220421. The reversal of 2421220402 is 2040221242.

It can be written as a sum of positive squares in 2 ways, for example, as 2352347001 + 68873401 = 48501^2 + 8299^2 .

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

It is a super-2 number, since 2×2421220402² = 11724616470122083208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2421220402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3855133 + ... + 3855760.

Almost surely, 2^2421220402 is an apocalyptic number.

2421220402 is a deficient number, since it is larger than the sum of its proper divisors (1233743354).

2421220402 is a wasteful number, since it uses less digits than its factorization.

2421220402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7711052.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 2421220402 is about 49205.8980407837. The cubic root of 2421220402 is about 1342.8003370557.

Adding to 2421220402 its reverse (2040221242), we get a palindrome (4461441644).

The spelling of 2421220402 in words is "two billion, four hundred twenty-one million, two hundred twenty thousand, four hundred two".