2420120621 has 2 divisors, whose sum is σ = 2420120622. Its totient is φ = 2420120620.

The previous prime is 2420120567. The next prime is 2420120641. The reversal of 2420120621 is 1260210242.

It is a happy number.

It is an a-pointer prime, because the next prime (2420120641) can be obtained adding 2420120621 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2360599396 + 59521225 = 48586^2 + 7715^2 .

It is a cyclic number.

It is not a de Polignac number, because 2420120621 - 2¹⁴ = 2420104237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2420120593 and 2420120602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2420120641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210060310 + 1210060311.

It is an arithmetic number, because the mean of its divisors is an integer number (1210060311).

Almost surely, 2^2420120621 is an apocalyptic number.

It is an amenable number.

2420120621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2420120621 is an equidigital number, since it uses as much as digits as its factorization.

2420120621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2420120621 is about 49194.7214749713. The cubic root of 2420120621 is about 1342.5969947040.

Adding to 2420120621 its reverse (1260210242), we get a palindrome (3680330863).

The spelling of 2420120621 in words is "two billion, four hundred twenty million, one hundred twenty thousand, six hundred twenty-one".