1205511342212 has 24 divisors (see below), whose sum is σ = 2252790946560. Its totient is φ = 563197733280.

The previous prime is 1205511342187. The next prime is 1205511342257. The reversal of 1205511342212 is 2122431155021.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167614778 + ... + 167621969.

It is an arithmetic number, because the mean of its divisors is an integer number (93866289440).

Almost surely, 2^{1205511342212} is an apocalyptic number.

It is an amenable number.

1205511342212 is a deficient number, since it is larger than the sum of its proper divisors (1047279604348).

1205511342212 is a wasteful number, since it uses less digits than its factorization.

1205511342212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335236811 (or 335236809 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 1205511342212 its reverse (2122431155021), we get a palindrome (3327942497233).

The spelling of 1205511342212 in words is "one trillion, two hundred five billion, five hundred eleven million, three hundred forty-two thousand, two hundred twelve".