1201210011 has 6 divisors (see below), whose sum is σ = 1735081140. Its totient is φ = 800806668.

The previous prime is 1201210007. The next prime is 1201210013. The reversal of 1201210011 is 1100121021.

It is a happy number.

It is not a de Polignac number, because 1201210011 - 2² = 1201210007 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: 133467779 = 1201210011 / (1 + 2 + 0 + 1 + 2 + 1 + 0 + 0 + 1 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 1201209975 and 1201210002.

It is not an unprimeable number, because it can be changed into a prime (1201210013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66733881 + ... + 66733898.

It is an arithmetic number, because the mean of its divisors is an integer number (289180190).

Almost surely, 2^1201210011 is an apocalyptic number.

1201210011 is a deficient number, since it is larger than the sum of its proper divisors (533871129).

1201210011 is a wasteful number, since it uses less digits than its factorization.

1201210011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133467785 (or 133467782 counting only the distinct ones).

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

The square root of 1201210011 is about 34658.4767553336. The cubic root of 1201210011 is about 1063.0156237978.

Adding to 1201210011 its reverse (1100121021), we get a palindrome (2301331032).

The spelling of 1201210011 in words is "one billion, two hundred one million, two hundred ten thousand, eleven".