1220222211 has 16 divisors (see below), whose sum is σ = 1753533600. Its totient is φ = 750297600.

The previous prime is 1220222177. The next prime is 1220222219. The reversal of 1220222211 is 1122220221.

It is not a de Polignac number, because 1220222211 - 2²⁹ = 683351299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220222219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38715 + ... + 62763.

It is an arithmetic number, because the mean of its divisors is an integer number (109595850).

Almost surely, 2^1220222211 is an apocalyptic number.

1220222211 is a deficient number, since it is larger than the sum of its proper divisors (533311389).

1220222211 is a wasteful number, since it uses less digits than its factorization.

1220222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25366.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1220222211 is about 34931.6791895265. The cubic root of 1220222211 is about 1068.5946002706.

Adding to 1220222211 its reverse (1122220221), we get a palindrome (2342442432).

The spelling of 1220222211 in words is "one billion, two hundred twenty million, two hundred twenty-two thousand, two hundred eleven".