1211204434 has 12 divisors (see below), whose sum is σ = 1996986222. Its totient is φ = 550547360.

The previous prime is 1211204431. The next prime is 1211204447. The reversal of 1211204434 is 4344021121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1107225625 + 103978809 = 33275^2 + 10197^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1211204431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2502247 + ... + 2502730.

Almost surely, 2^1211204434 is an apocalyptic number.

1211204434 is a deficient number, since it is larger than the sum of its proper divisors (785781788).

1211204434 is a wasteful number, since it uses less digits than its factorization.

1211204434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005001 (or 5004990 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1211204434 is about 34802.3624772802. The cubic root of 1211204434 is about 1065.9556863401.

Adding to 1211204434 its reverse (4344021121), we get a palindrome (5555225555).

The spelling of 1211204434 in words is "one billion, two hundred eleven million, two hundred four thousand, four hundred thirty-four".