1220211201 has 16 divisors (see below), whose sum is σ = 1791445248. Its totient is φ = 732608400.

The previous prime is 1220211191. The next prime is 1220211211. The reversal of 1220211201 is 1021120221.

It is an interprime number because it is at equal distance from previous prime (1220211191) and next prime (1220211211).

It is not a de Polignac number, because 1220211201 - 2¹⁸ = 1219949057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220211211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169255 + ... + 176316.

It is an arithmetic number, because the mean of its divisors is an integer number (111965328).

Almost surely, 2^1220211201 is an apocalyptic number.

1220211201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220211201 is a deficient number, since it is larger than the sum of its proper divisors (571234047).

1220211201 is a wasteful number, since it uses less digits than its factorization.

1220211201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345692.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1220211201 is about 34931.5215958309. The cubic root of 1220211201 is about 1068.5913863036.

Adding to 1220211201 its reverse (1021120221), we get a palindrome (2241331422).

The spelling of 1220211201 in words is "one billion, two hundred twenty million, two hundred eleven thousand, two hundred one".