1001201211 has 12 divisors (see below), whose sum is σ = 1447250688. Its totient is φ = 666973104.

The previous prime is 1001201197. The next prime is 1001201231. The reversal of 1001201211 is 1121021001.

It is a happy number.

It is not a de Polignac number, because 1001201211 - 2⁹ = 1001200699 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 = 1001201193 and 1001201202.

It is not an unprimeable number, because it can be changed into a prime (1001201231) 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, 28155 + ... + 52868.

It is an arithmetic number, because the mean of its divisors is an integer number (120604224).

Almost surely, 2^1001201211 is an apocalyptic number.

1001201211 is a deficient number, since it is larger than the sum of its proper divisors (446049477).

1001201211 is a wasteful number, since it uses less digits than its factorization.

1001201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82402 (or 82399 counting only the distinct ones).

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

The square root of 1001201211 is about 31641.7637150649. The cubic root of 1001201211 is about 1000.4002434505.

Adding to 1001201211 its reverse (1121021001), we get a palindrome (2122222212).

The spelling of 1001201211 in words is "one billion, one million, two hundred one thousand, two hundred eleven".