2001221120012 has 12 divisors (see below), whose sum is σ = 3622900303680. Its totient is φ = 966106747536.

The previous prime is 2001221119991. The next prime is 2001221120057. The reversal of 2001221120012 is 2100211221002.

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, 8625952988 + ... + 8625953219.

It is an arithmetic number, because the mean of its divisors is an integer number (301908358640).

Almost surely, 2^{2001221120012} is an apocalyptic number.

It is an amenable number.

2001221120012 is a deficient number, since it is larger than the sum of its proper divisors (1621679183668).

2001221120012 is a wasteful number, since it uses less digits than its factorization.

2001221120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17251906240 (or 17251906238 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2001221120012 its reverse (2100211221002), we get a palindrome (4101432341014).

The spelling of 2001221120012 in words is "two trillion, one billion, two hundred twenty-one million, one hundred twenty thousand, twelve".