220111221251 has 2 divisors, whose sum is σ = 220111221252. Its totient is φ = 220111221250.

The previous prime is 220111221167. The next prime is 220111221269. The reversal of 220111221251 is 152122111022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220111221251 is a prime.

It is not a weakly prime, because it can be changed into another prime (220111221751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110055610625 + 110055610626.

It is an arithmetic number, because the mean of its divisors is an integer number (110055610626).

Almost surely, 2^220111221251 is an apocalyptic number.

220111221251 is a deficient number, since it is larger than the sum of its proper divisors (1).

220111221251 is an equidigital number, since it uses as much as digits as its factorization.

220111221251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 220111221251 its reverse (152122111022), we get a palindrome (372233332273).

The spelling of 220111221251 in words is "two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, two hundred fifty-one".