2421211651 has 2 divisors, whose sum is σ = 2421211652. Its totient is φ = 2421211650.

The previous prime is 2421211643. The next prime is 2421211657. The reversal of 2421211651 is 1561121242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2421211651 - 2³ = 2421211643 is a prime.

It is not a weakly prime, because it can be changed into another prime (2421211657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210605825 + 1210605826.

It is an arithmetic number, because the mean of its divisors is an integer number (1210605826).

Almost surely, 2^2421211651 is an apocalyptic number.

2421211651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421211651 is an equidigital number, since it uses as much as digits as its factorization.

2421211651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 25.

The square root of 2421211651 is about 49205.8091184364. The cubic root of 2421211651 is about 1342.7987192958.

Adding to 2421211651 its reverse (1561121242), we get a palindrome (3982332893).

The spelling of 2421211651 in words is "two billion, four hundred twenty-one million, two hundred eleven thousand, six hundred fifty-one".