11221111112051 has 2 divisors, whose sum is σ = 11221111112052. Its totient is φ = 11221111112050.

The previous prime is 11221111112033. The next prime is 11221111112179. The reversal of 11221111112051 is 15021111112211.

11221111112051 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 11221111112051 - 2²⁶ = 11221044003187 is a prime.

It is not a weakly prime, because it can be changed into another prime (11221111112551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610555556025 + 5610555556026.

It is an arithmetic number, because the mean of its divisors is an integer number (5610555556026).

Almost surely, 2^{11221111112051} is an apocalyptic number.

11221111112051 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221111112051 is an equidigital number, since it uses as much as digits as its factorization.

11221111112051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 20.

Adding to 11221111112051 its reverse (15021111112211), we get a palindrome (26242222224262).

The spelling of 11221111112051 in words is "eleven trillion, two hundred twenty-one billion, one hundred eleven million, one hundred twelve thousand, fifty-one".