1111212205 has 16 divisors (see below), whose sum is σ = 1395339264. Its totient is φ = 848499840.

The previous prime is 1111212203. The next prime is 1111212331. The reversal of 1111212205 is 5022121111.

It is not a de Polignac number, because 1111212205 - 2¹ = 1111212203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111212203) 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, 37789 + ... + 60418.

It is an arithmetic number, because the mean of its divisors is an integer number (87208704).

Almost surely, 2^1111212205 is an apocalyptic number.

It is an amenable number.

1111212205 is a deficient number, since it is larger than the sum of its proper divisors (284127059).

1111212205 is an equidigital number, since it uses as much as digits as its factorization.

1111212205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98316.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 1111212205 is about 33334.8497071758. The cubic root of 1111212205 is about 1035.7755799204.

Adding to 1111212205 its reverse (5022121111), we get a palindrome (6133333316).

It can be divided in two parts, 1111 and 212205, that multiplied together give a triangular number (235759755 = T₂₁₇₁₄).

The spelling of 1111212205 in words is "one billion, one hundred eleven million, two hundred twelve thousand, two hundred five".