1220214311 has 4 divisors (see below), whose sum is σ = 1248591432. Its totient is φ = 1191837192.

The previous prime is 1220214301. The next prime is 1220214319. The reversal of 1220214311 is 1134120221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1134120221 = 13 ⋅87240017.

It is a de Polignac number, because none of the positive numbers 2^k-1220214311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220214311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220214319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14188496 + ... + 14188581.

It is an arithmetic number, because the mean of its divisors is an integer number (312147858).

Almost surely, 2^1220214311 is an apocalyptic number.

1220214311 is a deficient number, since it is larger than the sum of its proper divisors (28377121).

1220214311 is an equidigital number, since it uses as much as digits as its factorization.

1220214311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28377120.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1220214311 is about 34931.5661114700. The cubic root of 1220214311 is about 1068.5922941564.

Adding to 1220214311 its reverse (1134120221), we get a palindrome (2354334532).

The spelling of 1220214311 in words is "one billion, two hundred twenty million, two hundred fourteen thousand, three hundred eleven".