1212211113 has 16 divisors (see below), whose sum is σ = 1687549056. Its totient is φ = 772548480.

The previous prime is 1212211111. The next prime is 1212211141. The reversal of 1212211113 is 3111122121.

It is not a de Polignac number, because 1212211113 - 2¹ = 1212211111 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1212211092 and 1212211101.

It is not an unprimeable number, because it can be changed into a prime (1212211111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143343 + ... + 151563.

It is an arithmetic number, because the mean of its divisors is an integer number (105471816).

Almost surely, 2^1212211113 is an apocalyptic number.

It is an amenable number.

1212211113 is a deficient number, since it is larger than the sum of its proper divisors (475337943).

1212211113 is a wasteful number, since it uses less digits than its factorization.

1212211113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10384.

The product of its digits is 24, while the sum is 15.

The square root of 1212211113 is about 34816.8222702762. The cubic root of 1212211113 is about 1066.2509236042.

Adding to 1212211113 its reverse (3111122121), we get a palindrome (4323333234).

The spelling of 1212211113 in words is "one billion, two hundred twelve million, two hundred eleven thousand, one hundred thirteen".