1211979234 has 16 divisors (see below), whose sum is σ = 2424900672. Its totient is φ = 403836048.

The previous prime is 1211979233. The next prime is 1211979313. The reversal of 1211979234 is 4329791121.

It is a junction number, because it is equal to n+sod(n) for n = 1211979192 and 1211979201.

It is not an unprimeable number, because it can be changed into a prime (1211979233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21949 + ... + 53904.

It is an arithmetic number, because the mean of its divisors is an integer number (151556292).

Almost surely, 2^1211979234 is an apocalyptic number.

1211979234 is an abundant number, since it is smaller than the sum of its proper divisors (1212921438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211979234 is a wasteful number, since it uses less digits than its factorization.

1211979234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78521.

The product of its digits is 27216, while the sum is 39.

The square root of 1211979234 is about 34813.4921258985. The cubic root of 1211979234 is about 1066.1829329818.

The spelling of 1211979234 in words is "one billion, two hundred eleven million, nine hundred seventy-nine thousand, two hundred thirty-four".