1212040311111 has 40 divisors (see below), whose sum is σ = 2077477041024. Its totient is φ = 689835042000.

The previous prime is 1212040311091. The next prime is 1212040311127. The reversal of 1212040311111 is 1111130402121.

1212040311111 is a `hidden beast` number, since 121 + 20 + 403 + 11 + 111 = 666.

It is not a de Polignac number, because 1212040311111 - 2⁹ = 1212040310599 is a prime.

It is a super-3 number, since 3×1212040311111³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212040311161) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4115925 + ... + 4400558.

Almost surely, 2^{1212040311111} is an apocalyptic number.

1212040311111 is a deficient number, since it is larger than the sum of its proper divisors (865436729913).

1212040311111 is an equidigital number, since it uses as much as digits as its factorization.

1212040311111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8516753 (or 8516744 counting only the distinct ones).

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

Adding to 1212040311111 its reverse (1111130402121), we get a palindrome (2323170713232).

The spelling of 1212040311111 in words is "one trillion, two hundred twelve billion, forty million, three hundred eleven thousand, one hundred eleven".