1221134350 has 24 divisors (see below), whose sum is σ = 2272229568. Its totient is φ = 488256000.

The previous prime is 1221134329. The next prime is 1221134357. The reversal of 1221134350 is 534311221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221134357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 237507 + ... + 242593.

It is an arithmetic number, because the mean of its divisors is an integer number (94676232).

Almost surely, 2^1221134350 is an apocalyptic number.

1221134350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221134350 is a deficient number, since it is larger than the sum of its proper divisors (1051095218).

1221134350 is a wasteful number, since it uses less digits than its factorization.

1221134350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9900 (or 9895 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1221134350 is about 34944.7327933696. The cubic root of 1221134350 is about 1068.8607987907.

Adding to 1221134350 its reverse (534311221), we get a palindrome (1755445571).

The spelling of 1221134350 in words is "one billion, two hundred twenty-one million, one hundred thirty-four thousand, three hundred fifty".