1201201011 has 12 divisors (see below), whose sum is σ = 1837131192. Its totient is φ = 753694656.

The previous prime is 1201201009. The next prime is 1201201021. The reversal of 1201201011 is 1101021021.

It is a happy number.

It is not a de Polignac number, because 1201201011 - 2¹ = 1201201009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1201200984 and 1201201002.

It is not an unprimeable number, because it can be changed into a prime (1201201021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3925341 + ... + 3925646.

It is an arithmetic number, because the mean of its divisors is an integer number (153094266).

Almost surely, 2^1201201011 is an apocalyptic number.

1201201011 is a deficient number, since it is larger than the sum of its proper divisors (635930181).

1201201011 is a wasteful number, since it uses less digits than its factorization.

1201201011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7851010 (or 7851007 counting only the distinct ones).

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

The square root of 1201201011 is about 34658.3469167241. The cubic root of 1201201011 is about 1063.0129689291.

Adding to 1201201011 its reverse (1101021021), we get a palindrome (2302222032).

The spelling of 1201201011 in words is "one billion, two hundred one million, two hundred one thousand, eleven".