1201211111101 has 4 divisors (see below), whose sum is σ = 1201214166400. Its totient is φ = 1201208055804.

The previous prime is 1201211111083. The next prime is 1201211111123. The reversal of 1201211111101 is 1011111121021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1201211111101 - 2³¹ = 1199063627453 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 (1201211111131) 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, 832461 + ... + 1759378.

It is an arithmetic number, because the mean of its divisors is an integer number (300303541600).

Almost surely, 2^{1201211111101} is an apocalyptic number.

It is an amenable number.

1201211111101 is a deficient number, since it is larger than the sum of its proper divisors (3055299).

1201211111101 is an equidigital number, since it uses as much as digits as its factorization.

1201211111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3055298.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 1201211111101 its reverse (1011111121021), we get a palindrome (2212322232122).

The spelling of 1201211111101 in words is "one trillion, two hundred one billion, two hundred eleven million, one hundred eleven thousand, one hundred one".