1201200101 has 4 divisors (see below), whose sum is σ = 1201293612. Its totient is φ = 1201106592.

The previous prime is 1201200073. The next prime is 1201200107. The reversal of 1201200101 is 1010021021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 352876225 + 848323876 = 18785^2 + 29126^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201200101 - 2⁶ = 1201200037 is a prime.

It is a super-3 number, since 3×1201200101³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201200107) 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, 23696 + ... + 54441.

It is an arithmetic number, because the mean of its divisors is an integer number (300323403).

Almost surely, 2^1201200101 is an apocalyptic number.

It is an amenable number.

1201200101 is a deficient number, since it is larger than the sum of its proper divisors (93511).

1201200101 is an equidigital number, since it uses as much as digits as its factorization.

1201200101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93510.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1201200101 is about 34658.3337885710. Note that the first 3 decimals coincide. The cubic root of 1201200101 is about 1063.0127004917.

Adding to 1201200101 its reverse (1010021021), we get a palindrome (2211221122).

The spelling of 1201200101 in words is "one billion, two hundred one million, two hundred thousand, one hundred one".