1222121120 has 48 divisors (see below), whose sum is σ = 3149743968. Its totient is φ = 444407040.

The previous prime is 1222121111. The next prime is 1222121129. The reversal of 1222121120 is 211212221.

It is an interprime number because it is at equal distance from previous prime (1222121111) and next prime (1222121129).

It is a junction number, because it is equal to n+sod(n) for n = 1222121095 and 1222121104.

It is not an unprimeable number, because it can be changed into a prime (1222121129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345434 + ... + 348953.

It is an arithmetic number, because the mean of its divisors is an integer number (65619666).

Almost surely, 2^1222121120 is an apocalyptic number.

1222121120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222121120 is an abundant number, since it is smaller than the sum of its proper divisors (1927622848).

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

1222121120 is a wasteful number, since it uses less digits than its factorization.

1222121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694413 (or 694405 counting only the distinct ones).

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

The square root of 1222121120 is about 34958.8489513027. The cubic root of 1222121120 is about 1069.1486283813.

Adding to 1222121120 its reverse (211212221), we get a palindrome (1433333341).

The spelling of 1222121120 in words is "one billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty".