1211312030101 has 4 divisors (see below), whose sum is σ = 1211314373100. Its totient is φ = 1211309687104.

The previous prime is 1211312030099. The next prime is 1211312030177. The reversal of 1211312030101 is 1010302131121.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 434842649476 + 776469380625 = 659426^2 + 881175^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211312030101 - 2¹ = 1211312030099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211312030191) 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, 16306 + ... + 1556563.

It is an arithmetic number, because the mean of its divisors is an integer number (302828593275).

Almost surely, 2^{1211312030101} is an apocalyptic number.

It is an amenable number.

1211312030101 is a deficient number, since it is larger than the sum of its proper divisors (2342999).

1211312030101 is an equidigital number, since it uses as much as digits as its factorization.

1211312030101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2342998.

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

Adding to 1211312030101 its reverse (1010302131121), we get a palindrome (2221614161222).

The spelling of 1211312030101 in words is "one trillion, two hundred eleven billion, three hundred twelve million, thirty thousand, one hundred one".