12021994 has 4 divisors (see below), whose sum is σ = 18032994. Its totient is φ = 6010996.

The previous prime is 12021991. The next prime is 12022007. The reversal of 12021994 is 49912021.

It is a happy number.

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., 9579025 + 2442969 = 3095^2 + 1563^2 .

It is not an unprimeable number, because it can be changed into a prime (12021991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3005497 + ... + 3005500.

Almost surely, 2^12021994 is an apocalyptic number.

12021994 is a deficient number, since it is larger than the sum of its proper divisors (6011000).

12021994 is an equidigital number, since it uses as much as digits as its factorization.

12021994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6010999.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 12021994 is about 3467.2747223143. The cubic root of 12021994 is about 229.0826345053.

The spelling of 12021994 in words is "twelve million, twenty-one thousand, nine hundred ninety-four".