2051226421111 has 4 divisors (see below), whose sum is σ = 2344258766992. Its totient is φ = 1758194075232.

The previous prime is 2051226421073. The next prime is 2051226421159. The reversal of 2051226421111 is 1111246221502.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2051226421111 - 2¹¹ = 2051226419063 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2051226421111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051226721111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146516172930 + ... + 146516172943.

It is an arithmetic number, because the mean of its divisors is an integer number (586064691748).

Almost surely, 2^{2051226421111} is an apocalyptic number.

2051226421111 is a deficient number, since it is larger than the sum of its proper divisors (293032345881).

2051226421111 is an equidigital number, since it uses as much as digits as its factorization.

2051226421111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293032345880.

The product of its (nonzero) digits is 1920, while the sum is 28.

The spelling of 2051226421111 in words is "two trillion, fifty-one billion, two hundred twenty-six million, four hundred twenty-one thousand, one hundred eleven".