1211000011201 has 8 divisors (see below), whose sum is σ = 1217426163624. Its totient is φ = 1204575421440.

The previous prime is 1211000011187. The next prime is 1211000011259. The reversal of 1211000011201 is 1021100001121.

It can be written as a sum of positive squares in 4 ways, for example, as 609529964176 + 601470047025 = 780724^2 + 775545^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1211000011201 - 2²⁵ = 1210966456769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211000011271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1180071 + ... + 1953091.

It is an arithmetic number, because the mean of its divisors is an integer number (152178270453).

Almost surely, 2^{1211000011201} is an apocalyptic number.

It is an amenable number.

1211000011201 is a deficient number, since it is larger than the sum of its proper divisors (6426152423).

1211000011201 is an equidigital number, since it uses as much as digits as its factorization.

1211000011201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781331.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1211000011201 its reverse (1021100001121), we get a palindrome (2232100012322).

It can be divided in two parts, 121100001120 and 1, that added together give a palindrome (121100001121).

The spelling of 1211000011201 in words is "one trillion, two hundred eleven billion, eleven thousand, two hundred one".