1201111200001 has 24 divisors (see below), whose sum is σ = 1276606981160. Its totient is φ = 1129683456000.

The previous prime is 1201111199989. The next prime is 1201111200019. The reversal of 1201111200001 is 1000021111021.

It can be written as a sum of positive squares in 4 ways, for example, as 1919754225 + 1199191445776 = 43815^2 + 1095076^2 .

It is not a de Polignac number, because 1201111200001 - 2⁵ = 1201111199969 is a prime.

It is a super-2 number, since 2×1201111200001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201111207001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 183962305 + ... + 183968833.

Almost surely, 2^{1201111200001} is an apocalyptic number.

It is an amenable number.

1201111200001 is a deficient number, since it is larger than the sum of its proper divisors (75495781159).

1201111200001 is an equidigital number, since it uses as much as digits as its factorization.

1201111200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12337 (or 12314 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1201111200001 its reverse (1000021111021), we get a palindrome (2201132311022).

The spelling of 1201111200001 in words is "one trillion, two hundred one billion, one hundred eleven million, two hundred thousand, one".