1220313211 has 8 divisors (see below), whose sum is σ = 1344746480. Its totient is φ = 1100246112.

The previous prime is 1220313191. The next prime is 1220313223. The reversal of 1220313211 is 1123130221.

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 1220313211 - 2⁵ = 1220313179 is a prime.

It is a super-2 number, since 2×1220313211² = 2978328665882261042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220313911) 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, 1090956 + ... + 1092073.

It is an arithmetic number, because the mean of its divisors is an integer number (168093310).

Almost surely, 2^1220313211 is an apocalyptic number.

1220313211 is a deficient number, since it is larger than the sum of its proper divisors (124433269).

1220313211 is a wasteful number, since it uses less digits than its factorization.

1220313211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183085.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1220313211 is about 34932.9817078359. The cubic root of 1220313211 is about 1068.6211636541.

Adding to 1220313211 its reverse (1123130221), we get a palindrome (2343443432).

The spelling of 1220313211 in words is "one billion, two hundred twenty million, three hundred thirteen thousand, two hundred eleven".