12001222021000 has 64 divisors (see below), whose sum is σ = 28084021758000. Its totient is φ = 4800290137600.

The previous prime is 12001222020923. The next prime is 12001222021031. The reversal of 12001222021000 is 12022210021.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 139796723236 + 11861425297764 = 373894^2 + 3444042^2 .

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 in 15 ways as a sum of consecutive naturals, for example, 25233396 + ... + 25704604.

Almost surely, 2^{12001222021000} is an apocalyptic number.

12001222021000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001222021000 is an abundant number, since it is smaller than the sum of its proper divisors (16082799737000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12001222021000 is a wasteful number, since it uses less digits than its factorization.

12001222021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496699 (or 496685 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12001222021000 its reverse (12022210021), we get a palindrome (12013244231021).

The spelling of 12001222021000 in words is "twelve trillion, one billion, two hundred twenty-two million, twenty-one thousand".