1045221251211 has 16 divisors (see below), whose sum is σ = 1550560043520. Its totient is φ = 695876315400.

The previous prime is 1045221251197. The next prime is 1045221251287. The reversal of 1045221251211 is 1121521225401.

1045221251211 is a `hidden beast` number, since 1 + 0 + 4 + 522 + 12 + 5 + 121 + 1 = 666.

It is not a de Polignac number, because 1045221251211 - 2¹³ = 1045221243019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1045221211211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26031015 + ... + 26071136.

It is an arithmetic number, because the mean of its divisors is an integer number (96910002720).

Almost surely, 2^{1045221251211} is an apocalyptic number.

1045221251211 is a deficient number, since it is larger than the sum of its proper divisors (505338792309).

1045221251211 is an equidigital number, since it uses as much as digits as its factorization.

1045221251211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52102903 (or 52102897 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

Adding to 1045221251211 its reverse (1121521225401), we get a palindrome (2166742476612).

The spelling of 1045221251211 in words is "one trillion, forty-five billion, two hundred twenty-one million, two hundred fifty-one thousand, two hundred eleven".