1201111101231 has 32 divisors (see below), whose sum is σ = 1690381324800. Its totient is φ = 756522478080.

The previous prime is 1201111101163. The next prime is 1201111101283. The reversal of 1201111101231 is 1321011111021.

It is not a de Polignac number, because 1201111101231 - 2⁹ = 1201111100719 is a prime.

It is a super-2 number, since 2×1201111101231² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1201111101231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201111171231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126281766 + ... + 126291276.

It is an arithmetic number, because the mean of its divisors is an integer number (52824416400).

Almost surely, 2^{1201111101231} is an apocalyptic number.

1201111101231 is a deficient number, since it is larger than the sum of its proper divisors (489270223569).

1201111101231 is a wasteful number, since it uses less digits than its factorization.

1201111101231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15359.

The product of its (nonzero) digits is 12, while the sum is 15.

Adding to 1201111101231 its reverse (1321011111021), we get a palindrome (2522122212252).

The spelling of 1201111101231 in words is "one trillion, two hundred one billion, one hundred eleven million, one hundred one thousand, two hundred thirty-one".