1201020231111 has 4 divisors (see below), whose sum is σ = 1601360308152. Its totient is φ = 800680154072.

The previous prime is 1201020231053. The next prime is 1201020231119. The reversal of 1201020231111 is 1111320201021.

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

It is a cyclic number.

It is not a de Polignac number, because 1201020231111 - 2⁷ = 1201020230983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201020231119) 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, 200170038516 + ... + 200170038521.

It is an arithmetic number, because the mean of its divisors is an integer number (400340077038).

Almost surely, 2^{1201020231111} is an apocalyptic number.

1201020231111 is a deficient number, since it is larger than the sum of its proper divisors (400340077041).

1201020231111 is an equidigital number, since it uses as much as digits as its factorization.

1201020231111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400340077040.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1201020231111 its reverse (1111320201021), we get a palindrome (2312340432132).

The spelling of 1201020231111 in words is "one trillion, two hundred one billion, twenty million, two hundred thirty-one thousand, one hundred eleven".