1221143110 has 32 divisors (see below), whose sum is σ = 2524089600. Its totient is φ = 420680160.

The previous prime is 1221143087. The next prime is 1221143113. The reversal of 1221143110 is 113411221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221143113) 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, 290050 + ... + 294229.

It is an arithmetic number, because the mean of its divisors is an integer number (78877800).

Almost surely, 2^1221143110 is an apocalyptic number.

1221143110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221143110 is an abundant number, since it is smaller than the sum of its proper divisors (1302946490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221143110 is a wasteful number, since it uses less digits than its factorization.

1221143110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584316.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1221143110 is about 34944.8581339229. The cubic root of 1221143110 is about 1068.8633546652.

Adding to 1221143110 its reverse (113411221), we get a palindrome (1334554331).

The spelling of 1221143110 in words is "one billion, two hundred twenty-one million, one hundred forty-three thousand, one hundred ten".