1210021201 has 8 divisors (see below), whose sum is σ = 1253413800. Its totient is φ = 1166739840.

The previous prime is 1210021199. The next prime is 1210021207. The reversal of 1210021201 is 1021200121.

It can be written as a sum of positive squares in 4 ways, for example, as 21150801 + 1188870400 = 4599^2 + 34480^2 .

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 1210021201 - 2¹ = 1210021199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210021207) 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, 5346 + ... + 49483.

It is an arithmetic number, because the mean of its divisors is an integer number (156676725).

Almost surely, 2^1210021201 is an apocalyptic number.

It is an amenable number.

1210021201 is a deficient number, since it is larger than the sum of its proper divisors (43392599).

1210021201 is an equidigital number, since it uses as much as digits as its factorization.

1210021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55619.

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

The square root of 1210021201 is about 34785.3590034658. The cubic root of 1210021201 is about 1065.6084603757.

Adding to 1210021201 its reverse (1021200121), we get a palindrome (2231221322).

The spelling of 1210021201 in words is "one billion, two hundred ten million, twenty-one thousand, two hundred one".