1220211110 has 8 divisors (see below), whose sum is σ = 2196380016. Its totient is φ = 488084440.

The previous prime is 1220211077. The next prime is 1220211151. The reversal of 1220211110 is 111120221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1220211091 and 1220211100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61010546 + ... + 61010565.

It is an arithmetic number, because the mean of its divisors is an integer number (274547502).

Almost surely, 2^1220211110 is an apocalyptic number.

1220211110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220211110 is a deficient number, since it is larger than the sum of its proper divisors (976168906).

1220211110 is a wasteful number, since it uses less digits than its factorization.

1220211110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122021118.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1220211110 is about 34931.5202932824. The cubic root of 1220211110 is about 1068.5913597394.

Adding to 1220211110 its reverse (111120221), we get a palindrome (1331331331).

The spelling of 1220211110 in words is "one billion, two hundred twenty million, two hundred eleven thousand, one hundred ten".