11211110222251 has 2 divisors, whose sum is σ = 11211110222252. Its totient is φ = 11211110222250.

The previous prime is 11211110222201. The next prime is 11211110222281. The reversal of 11211110222251 is 15222201111211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11211110222251 - 2¹¹ = 11211110220203 is a prime.

It is not a weakly prime, because it can be changed into another prime (11211110222201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605555111125 + 5605555111126.

It is an arithmetic number, because the mean of its divisors is an integer number (5605555111126).

Almost surely, 2^{11211110222251} is an apocalyptic number.

11211110222251 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211110222251 is an equidigital number, since it uses as much as digits as its factorization.

11211110222251 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 22.

Adding to 11211110222251 its reverse (15222201111211), we get a palindrome (26433311333462).

The spelling of 11211110222251 in words is "eleven trillion, two hundred eleven billion, one hundred ten million, two hundred twenty-two thousand, two hundred fifty-one".