2121223012 has 6 divisors (see below), whose sum is σ = 3712140278. Its totient is φ = 1060611504.

The previous prime is 2121223003. The next prime is 2121223031. The reversal of 2121223012 is 2103221212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2070614016 + 50608996 = 45504^2 + 7114^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265152873 + ... + 265152880.

Almost surely, 2^2121223012 is an apocalyptic number.

It is an amenable number.

2121223012 is a deficient number, since it is larger than the sum of its proper divisors (1590917266).

2121223012 is a wasteful number, since it uses less digits than its factorization.

2121223012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530305757 (or 530305755 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2121223012 is about 46056.7368796358. The cubic root of 2121223012 is about 1284.8786416602.

Adding to 2121223012 its reverse (2103221212), we get a palindrome (4224444224).

The spelling of 2121223012 in words is "two billion, one hundred twenty-one million, two hundred twenty-three thousand, twelve".