11205225145 has 12 divisors (see below), whose sum is σ = 13586377644. Its totient is φ = 8871728640.

The previous prime is 11205225137. The next prime is 11205225173. The reversal of 11205225145 is 54152250211.

It can be written as a sum of positive squares in 6 ways, for example, as 10738729 + 11194486416 = 3277^2 + 105804^2 .

It is not a de Polignac number, because 11205225145 - 2³ = 11205225137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72046 + ... + 166135.

It is an arithmetic number, because the mean of its divisors is an integer number (1132198137).

Almost surely, 2^11205225145 is an apocalyptic number.

It is an amenable number.

11205225145 is a deficient number, since it is larger than the sum of its proper divisors (2381152499).

11205225145 is an frugal number, since it uses more digits than its factorization.

11205225145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238380 (or 238283 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 11205225145 its reverse (54152250211), we get a palindrome (65357475356).

The spelling of 11205225145 in words is "eleven billion, two hundred five million, two hundred twenty-five thousand, one hundred forty-five".