1220211351 has 16 divisors (see below), whose sum is σ = 1809573600. Its totient is φ = 812640384.

The previous prime is 1220211313. The next prime is 1220211353. The reversal of 1220211351 is 1531120221.

It is not a de Polignac number, because 1220211351 - 2⁹ = 1220210839 is a prime.

It is a super-2 number, since 2×1220211351² = 2977831482218490402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220211353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4255 + ... + 49583.

It is an arithmetic number, because the mean of its divisors is an integer number (113098350).

Almost surely, 2^1220211351 is an apocalyptic number.

1220211351 is a deficient number, since it is larger than the sum of its proper divisors (589362249).

1220211351 is an equidigital number, since it uses as much as digits as its factorization.

1220211351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46335 (or 46329 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1220211351 is about 34931.5237428887. The cubic root of 1220211351 is about 1068.5914300907.

Adding to 1220211351 its reverse (1531120221), we get a palindrome (2751331572).

The spelling of 1220211351 in words is "one billion, two hundred twenty million, two hundred eleven thousand, three hundred fifty-one".