1201212111001 has 8 divisors (see below), whose sum is σ = 1377144486720. Its totient is φ = 1026362396688.

The previous prime is 1201212110971. The next prime is 1201212111013. The reversal of 1201212111001 is 1001112121021.

It is a happy number.

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 1201212111001 - 2⁹ = 1201212110489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201212111061) 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, 270662971 + ... + 270667408.

It is an arithmetic number, because the mean of its divisors is an integer number (172143060840).

Almost surely, 2^{1201212111001} is an apocalyptic number.

It is an amenable number.

1201212111001 is a deficient number, since it is larger than the sum of its proper divisors (175932375719).

1201212111001 is an equidigital number, since it uses as much as digits as its factorization.

1201212111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541330703.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1201212111001 its reverse (1001112121021), we get a palindrome (2202324232022).

The spelling of 1201212111001 in words is "one trillion, two hundred one billion, two hundred twelve million, one hundred eleven thousand, one".