1211219994 has 16 divisors (see below), whose sum is σ = 2430334368. Its totient is φ = 402424272.

The previous prime is 1211219987. The next prime is 1211220011. The reversal of 1211219994 is 4999121121.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326937 + ... + 330620.

It is an arithmetic number, because the mean of its divisors is an integer number (151895898).

Almost surely, 2^1211219994 is an apocalyptic number.

1211219994 is an abundant number, since it is smaller than the sum of its proper divisors (1219114374).

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

1211219994 is a wasteful number, since it uses less digits than its factorization.

1211219994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657869.

The product of its digits is 11664, while the sum is 39.

The square root of 1211219994 is about 34802.5860246046. The cubic root of 1211219994 is about 1065.9602509974.

The spelling of 1211219994 in words is "one billion, two hundred eleven million, two hundred nineteen thousand, nine hundred ninety-four".