1201322011 has 4 divisors (see below), whose sum is σ = 1213706872. Its totient is φ = 1188937152.

The previous prime is 1201321999. The next prime is 1201322047. The reversal of 1201322011 is 1102231021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201322011 is a prime.

It is a super-2 number, since 2×1201322011² = 2886349148226168242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201321982 and 1201322000.

It is not an unprimeable number, because it can be changed into a prime (1201322711) 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, 6192285 + ... + 6192478.

It is an arithmetic number, because the mean of its divisors is an integer number (303426718).

Almost surely, 2^1201322011 is an apocalyptic number.

1201322011 is a deficient number, since it is larger than the sum of its proper divisors (12384861).

1201322011 is an equidigital number, since it uses as much as digits as its factorization.

1201322011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12384860.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1201322011 is about 34660.0924840082. The cubic root of 1201322011 is about 1063.0486610543.

Adding to 1201322011 its reverse (1102231021), we get a palindrome (2303553032).

The spelling of 1201322011 in words is "one billion, two hundred one million, three hundred twenty-two thousand, eleven".