1201111121212 has 6 divisors (see below), whose sum is σ = 2101944462128. Its totient is φ = 600555560604.

The previous prime is 1201111121129. The next prime is 1201111121213. The reversal of 1201111121212 is 2121211111021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201111121213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150138890148 + ... + 150138890155.

Almost surely, 2^{1201111121212} is an apocalyptic number.

It is an amenable number.

1201111121212 is a deficient number, since it is larger than the sum of its proper divisors (900833340916).

1201111121212 is a wasteful number, since it uses less digits than its factorization.

1201111121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300277780307 (or 300277780305 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 1201111121212 its reverse (2121211111021), we get a palindrome (3322322232233).

The spelling of 1201111121212 in words is "one trillion, two hundred one billion, one hundred eleven million, one hundred twenty-one thousand, two hundred twelve".