11212211123251 has 2 divisors, whose sum is σ = 11212211123252. Its totient is φ = 11212211123250.

The previous prime is 11212211123213. The next prime is 11212211123317. The reversal of 11212211123251 is 15232111221211.

11212211123251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11212211123251 - 2²¹ = 11212209026099 is a prime.

It is a super-2 number, since 2×11212211123251² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11212211126251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606105561625 + 5606105561626.

It is an arithmetic number, because the mean of its divisors is an integer number (5606105561626).

Almost surely, 2^{11212211123251} is an apocalyptic number.

11212211123251 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212211123251 is an equidigital number, since it uses as much as digits as its factorization.

11212211123251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 25.

Adding to 11212211123251 its reverse (15232111221211), we get a palindrome (26444322344462).

The spelling of 11212211123251 in words is "eleven trillion, two hundred twelve billion, two hundred eleven million, one hundred twenty-three thousand, two hundred fifty-one".