1211111204 has 12 divisors (see below), whose sum is σ = 2133481728. Its totient is φ = 601545000.

The previous prime is 1211111201. The next prime is 1211111249. The reversal of 1211111204 is 4021111121.

It is not an unprimeable number, because it can be changed into a prime (1211111201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1001972 + ... + 1003179.

It is an arithmetic number, because the mean of its divisors is an integer number (177790144).

Almost surely, 2^1211111204 is an apocalyptic number.

It is an amenable number.

1211111204 is a deficient number, since it is larger than the sum of its proper divisors (922370524).

1211111204 is a wasteful number, since it uses less digits than its factorization.

1211111204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005306 (or 2005304 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 1211111204 is about 34801.0230309398. The cubic root of 1211111204 is about 1065.9283357141.

Adding to 1211111204 its reverse (4021111121), we get a palindrome (5232222325).

The spelling of 1211111204 in words is "one billion, two hundred eleven million, one hundred eleven thousand, two hundred four".