1200002211001 has 16 divisors (see below), whose sum is σ = 1386429663168. Its totient is φ = 1026494784000.

The previous prime is 1200002210921. The next prime is 1200002211011. The reversal of 1200002211001 is 1001122000021.

It is a cyclic number.

It is not a de Polignac number, because 1200002211001 - 2²¹ = 1200000113849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200002211011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21826 + ... + 1549348.

It is an arithmetic number, because the mean of its divisors is an integer number (86651853948).

Almost surely, 2^{1200002211001} is an apocalyptic number.

1200002211001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200002211001 is a deficient number, since it is larger than the sum of its proper divisors (186427452167).

1200002211001 is a wasteful number, since it uses less digits than its factorization.

1200002211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531752.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1200002211001 its reverse (1001122000021), we get a palindrome (2201124211022).

The spelling of 1200002211001 in words is "one trillion, two hundred billion, two million, two hundred eleven thousand, one".