2222121004 has 6 divisors (see below), whose sum is σ = 3888711764. Its totient is φ = 1111060500.

The previous prime is 2222120987. The next prime is 2222121007. The reversal of 2222121004 is 4001212222.

It is not an unprimeable number, because it can be changed into a prime (2222121007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277765122 + ... + 277765129.

Almost surely, 2^2222121004 is an apocalyptic number.

It is an amenable number.

2222121004 is a deficient number, since it is larger than the sum of its proper divisors (1666590760).

2222121004 is a wasteful number, since it uses less digits than its factorization.

2222121004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555530255 (or 555530253 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2222121004 is about 47139.3784855083. The cubic root of 2222121004 is about 1304.9360672917.

Adding to 2222121004 its reverse (4001212222), we get a palindrome (6223333226).

The spelling of 2222121004 in words is "two billion, two hundred twenty-two million, one hundred twenty-one thousand, four".