1201001202101 has 4 divisors (see below), whose sum is σ = 1206155713932. Its totient is φ = 1195846690272.

The previous prime is 1201001202073. The next prime is 1201001202109. The reversal of 1201001202101 is 1012021001021.

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 783393159025 + 417608043076 = 885095^2 + 646226^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201001202101 - 2²⁶ = 1200934093237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201001202109) 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, 2577255566 + ... + 2577256031.

It is an arithmetic number, because the mean of its divisors is an integer number (301538928483).

Almost surely, 2^{1201001202101} is an apocalyptic number.

It is an amenable number.

1201001202101 is a deficient number, since it is larger than the sum of its proper divisors (5154511831).

1201001202101 is an equidigital number, since it uses as much as digits as its factorization.

1201001202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5154511830.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1201001202101 its reverse (1012021001021), we get a palindrome (2213022203122).

The spelling of 1201001202101 in words is "one trillion, two hundred one billion, one million, two hundred two thousand, one hundred one".