1211200002001 has 8 divisors (see below), whose sum is σ = 1352037212064. Its totient is φ = 1075484145120.

The previous prime is 1211200001989. The next prime is 1211200002007. The reversal of 1211200002001 is 1002000021121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211200002001 - 2²¹ = 1211197904849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211200002007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1280337796 + ... + 1280338741.

It is an arithmetic number, because the mean of its divisors is an integer number (169004651508).

Almost surely, 2^{1211200002001} is an apocalyptic number.

1211200002001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211200002001 is a deficient number, since it is larger than the sum of its proper divisors (140837210063).

1211200002001 is a wasteful number, since it uses less digits than its factorization.

1211200002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560676591.

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

Adding to 1211200002001 its reverse (1002000021121), we get a palindrome (2213200023122).

The spelling of 1211200002001 in words is "one trillion, two hundred eleven billion, two hundred million, two thousand, one".