1211021201 has 8 divisors (see below), whose sum is σ = 1304447424. Its totient is φ = 1117633680.

The previous prime is 1211021173. The next prime is 1211021213. The reversal of 1211021201 is 1021201121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211021201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211021281) 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, 113060 + ... + 123306.

It is an arithmetic number, because the mean of its divisors is an integer number (163055928).

Almost surely, 2^1211021201 is an apocalyptic number.

It is an amenable number.

1211021201 is a deficient number, since it is larger than the sum of its proper divisors (93426223).

1211021201 is a wasteful number, since it uses less digits than its factorization.

1211021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19351.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1211021201 is about 34799.7298983771. The cubic root of 1211021201 is about 1065.9019304525.

Adding to 1211021201 its reverse (1021201121), we get a palindrome (2232222322).

It can be divided in two parts, 121 and 1021201, that multiplied together give a palindrome (123565321).

The spelling of 1211021201 in words is "one billion, two hundred eleven million, twenty-one thousand, two hundred one".