1201111212212 has 6 divisors (see below), whose sum is σ = 2101944621378. Its totient is φ = 600555606104.

The previous prime is 1201111212211. The next prime is 1201111212233. The reversal of 1201111212212 is 2122121111021.

It can be written as a sum of positive squares in only one way, i.e., 952255898896 + 248855313316 = 975836^2 + 498854^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201111212211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150138901523 + ... + 150138901530.

It is an arithmetic number, because the mean of its divisors is an integer number (350324103563).

Almost surely, 2^{1201111212212} is an apocalyptic number.

It is an amenable number.

1201111212212 is a deficient number, since it is larger than the sum of its proper divisors (900833409166).

1201111212212 is a wasteful number, since it uses less digits than its factorization.

1201111212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300277803057 (or 300277803055 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1201111212212 its reverse (2122121111021), we get a palindrome (3323232323233).

The spelling of 1201111212212 in words is "one trillion, two hundred one billion, one hundred eleven million, two hundred twelve thousand, two hundred twelve".