611220204251 has 2 divisors, whose sum is σ = 611220204252. Its totient is φ = 611220204250.

The previous prime is 611220204239. The next prime is 611220204277. The reversal of 611220204251 is 152402022116.

611220204251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (611220204277) can be obtained adding 611220204251 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 611220204251 - 2⁶ = 611220204187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 611220204251.

It is not a weakly prime, because it can be changed into another prime (611220206251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305610102125 + 305610102126.

It is an arithmetic number, because the mean of its divisors is an integer number (305610102126).

Almost surely, 2^611220204251 is an apocalyptic number.

611220204251 is a deficient number, since it is larger than the sum of its proper divisors (1).

611220204251 is an equidigital number, since it uses as much as digits as its factorization.

611220204251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 611220204251 its reverse (152402022116), we get a palindrome (763622226367).

The spelling of 611220204251 in words is "six hundred eleven billion, two hundred twenty million, two hundred four thousand, two hundred fifty-one".