1201212001101 has 16 divisors (see below), whose sum is σ = 1830444635264. Its totient is φ = 686396977344.

The previous prime is 1201212001091. The next prime is 1201212001117. The reversal of 1201212001101 is 1011002121021.

It is not a de Polignac number, because 1201212001101 - 2⁹ = 1201212000589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201212001141) 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, 1235151 + ... + 1981923.

It is an arithmetic number, because the mean of its divisors is an integer number (114402789704).

Almost surely, 2^{1201212001101} is an apocalyptic number.

It is an amenable number.

1201212001101 is a deficient number, since it is larger than the sum of its proper divisors (629232634163).

1201212001101 is an equidigital number, since it uses as much as digits as its factorization.

1201212001101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823380.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1201212001101 its reverse (1011002121021), we get a palindrome (2212214122122).

The spelling of 1201212001101 in words is "one trillion, two hundred one billion, two hundred twelve million, one thousand, one hundred one".