1212011322111 has 12 divisors (see below), whose sum is σ = 1750760509680. Its totient is φ = 807971784000.

The previous prime is 1212011322107. The next prime is 1212011322121. The reversal of 1212011322111 is 1112231102121.

It is a happy number.

1212011322111 is a `hidden beast` number, since 121 + 201 + 132 + 211 + 1 = 666.

It is not a de Polignac number, because 1212011322111 - 2² = 1212011322107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212011322121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2764890 + ... + 3173111.

It is an arithmetic number, because the mean of its divisors is an integer number (145896709140).

Almost surely, 2^{1212011322111} is an apocalyptic number.

1212011322111 is a deficient number, since it is larger than the sum of its proper divisors (538749187569).

1212011322111 is a wasteful number, since it uses less digits than its factorization.

1212011322111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5960686 (or 5960683 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1212011322111 its reverse (1112231102121), we get a palindrome (2324242424232).

The spelling of 1212011322111 in words is "one trillion, two hundred twelve billion, eleven million, three hundred twenty-two thousand, one hundred eleven".