1222111420 has 12 divisors (see below), whose sum is σ = 2566434024. Its totient is φ = 488844560.

The previous prime is 1222111411. The next prime is 1222111441. The reversal of 1222111420 is 241112221.

It is a junction number, because it is equal to n+sod(n) for n = 1222111394 and 1222111403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30552766 + ... + 30552805.

It is an arithmetic number, because the mean of its divisors is an integer number (213869502).

Almost surely, 2^1222111420 is an apocalyptic number.

1222111420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222111420 is an abundant number, since it is smaller than the sum of its proper divisors (1344322604).

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

1222111420 is a wasteful number, since it uses less digits than its factorization.

1222111420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61105580 (or 61105578 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1222111420 is about 34958.7102164825. The cubic root of 1222111420 is about 1069.1457997557.

Adding to 1222111420 its reverse (241112221), we get a palindrome (1463223641).

The spelling of 1222111420 in words is "one billion, two hundred twenty-two million, one hundred eleven thousand, four hundred twenty".