1212012111 has 32 divisors (see below), whose sum is σ = 1708390656. Its totient is φ = 763488000.

The previous prime is 1212012107. The next prime is 1212012119. The reversal of 1212012111 is 1112102121.

It is not a de Polignac number, because 1212012111 - 2² = 1212012107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212012119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 501496 + ... + 503906.

It is an arithmetic number, because the mean of its divisors is an integer number (53387208).

Almost surely, 2^1212012111 is an apocalyptic number.

1212012111 is a deficient number, since it is larger than the sum of its proper divisors (496378545).

1212012111 is a wasteful number, since it uses less digits than its factorization.

1212012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1212012111 is about 34813.9643103166. The cubic root of 1212012111 is about 1066.1925735704.

Adding to 1212012111 its reverse (1112102121), we get a palindrome (2324114232).

The spelling of 1212012111 in words is "one billion, two hundred twelve million, twelve thousand, one hundred eleven".