1200001010101 has 4 divisors (see below), whose sum is σ = 1200019365900. Its totient is φ = 1199982654304.

The previous prime is 1200001010099. The next prime is 1200001010123. The reversal of 1200001010101 is 1010101000021.

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 635924907601 + 564076102500 = 797449^2 + 751050^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200001010101 - 2¹ = 1200001010099 is a prime.

It is a Duffinian number.

1200001010101 is a modest number, since divided by 1010101 gives 12000 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200001010501) 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, 9079486 + ... + 9210703.

It is an arithmetic number, because the mean of its divisors is an integer number (300004841475).

Almost surely, 2^{1200001010101} is an apocalyptic number.

It is an amenable number.

1200001010101 is a deficient number, since it is larger than the sum of its proper divisors (18355799).

1200001010101 is an equidigital number, since it uses as much as digits as its factorization.

1200001010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18355798.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 1200001010101 its reverse (1010101000021), we get a palindrome (2210102010122).

The spelling of 1200001010101 in words is "one trillion, two hundred billion, one million, ten thousand, one hundred one".