1231130202101 has 8 divisors (see below), whose sum is σ = 1310751560664. Its totient is φ = 1152309058560.

The previous prime is 1231130202059. The next prime is 1231130202103. The reversal of 1231130202101 is 1012020311321.

It can be written as a sum of positive squares in 4 ways, for example, as 186860811076 + 1044269391025 = 432274^2 + 1021895^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231130202101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231130202101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231130202103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200050580 + ... + 200056733.

It is an arithmetic number, because the mean of its divisors is an integer number (163843945083).

Almost surely, 2^{1231130202101} is an apocalyptic number.

It is an amenable number.

1231130202101 is a deficient number, since it is larger than the sum of its proper divisors (79621358563).

1231130202101 is a wasteful number, since it uses less digits than its factorization.

1231130202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400107511.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1231130202101 its reverse (1012020311321), we get a palindrome (2243150513422).

The spelling of 1231130202101 in words is "one trillion, two hundred thirty-one billion, one hundred thirty million, two hundred two thousand, one hundred one".