1220122211 has 16 divisors (see below), whose sum is σ = 1570265088. Its totient is φ = 920073600.

The previous prime is 1220122201. The next prime is 1220122217. The reversal of 1220122211 is 1122210221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220122211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220122217) 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, 253190 + ... + 257963.

It is an arithmetic number, because the mean of its divisors is an integer number (98141568).

Almost surely, 2^1220122211 is an apocalyptic number.

1220122211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220122211 is a deficient number, since it is larger than the sum of its proper divisors (350142877).

1220122211 is a wasteful number, since it uses less digits than its factorization.

1220122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511202.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1220122211 is about 34930.2477947122. The cubic root of 1220122211 is about 1068.5654082163.

Adding to 1220122211 its reverse (1122210221), we get a palindrome (2342332432).

The spelling of 1220122211 in words is "one billion, two hundred twenty million, one hundred twenty-two thousand, two hundred eleven".