620122221 has 12 divisors (see below), whose sum is σ = 916563648. Its totient is φ = 403800264.

The previous prime is 620122219. The next prime is 620122231. The reversal of 620122221 is 122221026.

620122221 is a `hidden beast` number, since 620 + 1 + 2 + 22 + 21 = 666.

620122221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 620122221 - 2¹ = 620122219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 620122194 and 620122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620122201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 800805 + ... + 801578.

It is an arithmetic number, because the mean of its divisors is an integer number (76380304).

Almost surely, 2^620122221 is an apocalyptic number.

It is an amenable number.

620122221 is a deficient number, since it is larger than the sum of its proper divisors (296441427).

620122221 is a wasteful number, since it uses less digits than its factorization.

620122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602432 (or 1602429 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 620122221 is about 24902.2533317770. The cubic root of 620122221 is about 852.7579258719.

Adding to 620122221 its reverse (122221026), we get a palindrome (742343247).

The spelling of 620122221 in words is "six hundred twenty million, one hundred twenty-two thousand, two hundred twenty-one".