1201212111101 has 4 divisors (see below), whose sum is σ = 1209273937500. Its totient is φ = 1193150284704.

The previous prime is 1201212111079. The next prime is 1201212111103. The reversal of 1201212111101 is 1011112121021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 378655622500 + 822556488601 = 615350^2 + 906949^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201212111101 - 2²⁶ = 1201145002237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201212111103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4030912976 + ... + 4030913273.

It is an arithmetic number, because the mean of its divisors is an integer number (302318484375).

Almost surely, 2^{1201212111101} is an apocalyptic number.

It is an amenable number.

1201212111101 is a deficient number, since it is larger than the sum of its proper divisors (8061826399).

1201212111101 is an equidigital number, since it uses as much as digits as its factorization.

1201212111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8061826398.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1201212111101 its reverse (1011112121021), we get a palindrome (2212324232122).

The spelling of 1201212111101 in words is "one trillion, two hundred one billion, two hundred twelve million, one hundred eleven thousand, one hundred one".