1200101211 has 8 divisors (see below), whose sum is σ = 1777927760. Its totient is φ = 800067456.

The previous prime is 1200101191. The next prime is 1200101261. The reversal of 1200101211 is 1121010021.

It is a happy number.

It is not a de Polignac number, because 1200101211 - 2⁷ = 1200101083 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200101193 and 1200101202.

It is not an unprimeable number, because it can be changed into a prime (1200101261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22224070 + ... + 22224123.

It is an arithmetic number, because the mean of its divisors is an integer number (222240970).

Almost surely, 2^1200101211 is an apocalyptic number.

1200101211 is a deficient number, since it is larger than the sum of its proper divisors (577826549).

1200101211 is an equidigital number, since it uses as much as digits as its factorization.

1200101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44448202 (or 44448196 counting only the distinct ones).

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

The square root of 1200101211 is about 34642.4769755282. The cubic root of 1200101211 is about 1062.6884441028.

Adding to 1200101211 its reverse (1121010021), we get a palindrome (2321111232).

The spelling of 1200101211 in words is "one billion, two hundred million, one hundred one thousand, two hundred eleven".