1201120101 has 6 divisors (see below), whose sum is σ = 1734951270. Its totient is φ = 800746728.

The previous prime is 1201120097. The next prime is 1201120103. The reversal of 1201120101 is 1010211021.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 862596900 + 338523201 = 29370^2 + 18399^2 .

It is not a de Polignac number, because 1201120101 - 2² = 1201120097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 133457789 = 1201120101 / (1 + 2 + 0 + 1 + 1 + 2 + 0 + 1 + 0 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201120103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66728886 + ... + 66728903.

It is an arithmetic number, because the mean of its divisors is an integer number (289158545).

Almost surely, 2^1201120101 is an apocalyptic number.

It is an amenable number.

1201120101 is a deficient number, since it is larger than the sum of its proper divisors (533831169).

1201120101 is a wasteful number, since it uses less digits than its factorization.

1201120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133457795 (or 133457792 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1201120101 is about 34657.1796457819. The cubic root of 1201120101 is about 1062.9891010642.

Adding to 1201120101 its reverse (1010211021), we get a palindrome (2211331122).

The spelling of 1201120101 in words is "one billion, two hundred one million, one hundred twenty thousand, one hundred one".