1001222121212 has 12 divisors (see below), whose sum is σ = 1752331509096. Its totient is φ = 500555975760.

The previous prime is 1001222121203. The next prime is 1001222121287. The reversal of 1001222121212 is 2121212221001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13730303 + ... + 13803030.

It is an arithmetic number, because the mean of its divisors is an integer number (146027625758).

Almost surely, 2^{1001222121212} is an apocalyptic number.

It is an amenable number.

1001222121212 is a deficient number, since it is larger than the sum of its proper divisors (751109387884).

1001222121212 is a wasteful number, since it uses less digits than its factorization.

1001222121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27542428 (or 27542426 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1001222121212 its reverse (2121212221001), we get a palindrome (3122434342213).

The spelling of 1001222121212 in words is "one trillion, one billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred twelve".