11221211045 has 32 divisors (see below), whose sum is σ = 15536309760. Its totient is φ = 7694568000.

The previous prime is 11221211041. The next prime is 11221211101. The reversal of 11221211045 is 54011212211.

It is not a de Polignac number, because 11221211045 - 2² = 11221211041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221211041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 195050 + ... + 245940.

It is an arithmetic number, because the mean of its divisors is an integer number (485509680).

Almost surely, 2^11221211045 is an apocalyptic number.

It is an amenable number.

11221211045 is a deficient number, since it is larger than the sum of its proper divisors (4315098715).

11221211045 is a wasteful number, since it uses less digits than its factorization.

11221211045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51137.

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 11221211045 its reverse (54011212211), we get a palindrome (65232423256).

The spelling of 11221211045 in words is "eleven billion, two hundred twenty-one million, two hundred eleven thousand, forty-five".