1201100311231 has 4 divisors (see below), whose sum is σ = 1201139393272. Its totient is φ = 1201061229192.

The previous prime is 1201100311141. The next prime is 1201100311253. The reversal of 1201100311231 is 1321130011021.

It is a happy number.

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 1201100311231 - 2²³ = 1201091922623 is a prime.

It is a super-2 number, since 2×1201100311231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201100311291) 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, 19494885 + ... + 19556398.

It is an arithmetic number, because the mean of its divisors is an integer number (300284848318).

Almost surely, 2^{1201100311231} is an apocalyptic number.

1201100311231 is a deficient number, since it is larger than the sum of its proper divisors (39082041).

1201100311231 is an equidigital number, since it uses as much as digits as its factorization.

1201100311231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39082040.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1201100311231 its reverse (1321130011021), we get a palindrome (2522230322252).

The spelling of 1201100311231 in words is "one trillion, two hundred one billion, one hundred million, three hundred eleven thousand, two hundred thirty-one".