1211200212001 has 16 divisors (see below), whose sum is σ = 1376823965440. Its totient is φ = 1059187151952.

The previous prime is 1211200211999. The next prime is 1211200212029. The reversal of 1211200212001 is 1002120021121.

It is not a de Polignac number, because 1211200212001 - 2¹ = 1211200211999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211200210001) 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, 6702585 + ... + 6880918.

It is an arithmetic number, because the mean of its divisors is an integer number (86051497840).

Almost surely, 2^{1211200212001} is an apocalyptic number.

It is an amenable number.

1211200212001 is a deficient number, since it is larger than the sum of its proper divisors (165623753439).

1211200212001 is an equidigital number, since it uses as much as digits as its factorization.

1211200212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13583573 (or 13583535 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1211200212001 its reverse (1002120021121), we get a palindrome (2213320233122).

The spelling of 1211200212001 in words is "one trillion, two hundred eleven billion, two hundred million, two hundred twelve thousand, one".