1211122201 has 8 divisors (see below), whose sum is σ = 1264463424. Its totient is φ = 1157838000.

The previous prime is 1211122181. The next prime is 1211122207. The reversal of 1211122201 is 1022211121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211122201 - 2⁵ = 1211122169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211122207) 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, 32451 + ... + 58951.

It is an arithmetic number, because the mean of its divisors is an integer number (158057928).

Almost surely, 2^1211122201 is an apocalyptic number.

It is an amenable number.

1211122201 is a deficient number, since it is larger than the sum of its proper divisors (53341223).

1211122201 is a wasteful number, since it uses less digits than its factorization.

1211122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28511.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1211122201 is about 34801.1810288099. The cubic root of 1211122201 is about 1065.9315619464.

Adding to 1211122201 its reverse (1022211121), we get a palindrome (2233333322).

The spelling of 1211122201 in words is "one billion, two hundred eleven million, one hundred twenty-two thousand, two hundred one".