1201022011 has 4 divisors (see below), whose sum is σ = 1372596592. Its totient is φ = 1029447432.

The previous prime is 1201021963. The next prime is 1201022041. The reversal of 1201022011 is 1102201021.

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

It is a cyclic number.

It is not a de Polignac number, because 1201022011 - 2¹⁷ = 1200890939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201022041) 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, 85787280 + ... + 85787293.

It is an arithmetic number, because the mean of its divisors is an integer number (343149148).

Almost surely, 2^1201022011 is an apocalyptic number.

1201022011 is a deficient number, since it is larger than the sum of its proper divisors (171574581).

1201022011 is an equidigital number, since it uses as much as digits as its factorization.

1201022011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171574580.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1201022011 is about 34655.7644699983. The cubic root of 1201022011 is about 1062.9601637860.

Adding to 1201022011 its reverse (1102201021), we get a palindrome (2303223032).

The spelling of 1201022011 in words is "one billion, two hundred one million, twenty-two thousand, eleven".