1201111994 has 4 divisors (see below), whose sum is σ = 1801667994. Its totient is φ = 600555996.

The previous prime is 1201111993. The next prime is 1201112027. The reversal of 1201111994 is 4991111021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 975000625 + 226111369 = 31225^2 + 15037^2 .

It is not an unprimeable number, because it can be changed into a prime (1201111993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300277997 + ... + 300278000.

Almost surely, 2^1201111994 is an apocalyptic number.

1201111994 is a deficient number, since it is larger than the sum of its proper divisors (600556000).

1201111994 is an equidigital number, since it uses as much as digits as its factorization.

1201111994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600555999.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 1201111994 is about 34657.0626856922. The cubic root of 1201111994 is about 1062.9867094987.

The spelling of 1201111994 in words is "one billion, two hundred one million, one hundred eleven thousand, nine hundred ninety-four".