1200012221001 has 32 divisors (see below), whose sum is σ = 1761481998720. Its totient is φ = 720613555200.

The previous prime is 1200012220997. The next prime is 1200012221003. The reversal of 1200012221001 is 1001222100021.

It is not a de Polignac number, because 1200012221001 - 2² = 1200012220997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200012221003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11991111 + ... + 12090771.

It is an arithmetic number, because the mean of its divisors is an integer number (55046312460).

Almost surely, 2^{1200012221001} is an apocalyptic number.

1200012221001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200012221001 is a deficient number, since it is larger than the sum of its proper divisors (561469777719).

1200012221001 is a wasteful number, since it uses less digits than its factorization.

1200012221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103017.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1200012221001 its reverse (1001222100021), we get a palindrome (2201234321022).

The spelling of 1200012221001 in words is "one trillion, two hundred billion, twelve million, two hundred twenty-one thousand, one".