1220120110 has 16 divisors (see below), whose sum is σ = 2395872432. Its totient is φ = 443680000.

The previous prime is 1220120089. The next prime is 1220120113. The reversal of 1220120110 is 110210221.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220120113) 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, 5545891 + ... + 5546110.

It is an arithmetic number, because the mean of its divisors is an integer number (149742027).

Almost surely, 2^1220120110 is an apocalyptic number.

1220120110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220120110 is a deficient number, since it is larger than the sum of its proper divisors (1175752322).

1220120110 is a wasteful number, since it uses less digits than its factorization.

1220120110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11092019.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1220120110 is about 34930.2177204781. The cubic root of 1220120110 is about 1068.5647948741.

Adding to 1220120110 its reverse (110210221), we get a palindrome (1330330331).

The spelling of 1220120110 in words is "one billion, two hundred twenty million, one hundred twenty thousand, one hundred ten".