1212220422 has 24 divisors (see below), whose sum is σ = 3001688976. Its totient is φ = 346348656.

The previous prime is 1212220397. The next prime is 1212220453. The reversal of 1212220422 is 2240222121.

1212220422 is a `hidden beast` number, since 1 + 21 + 2 + 220 + 422 = 666.

It is a super-4 number, since 4×1212220422⁴ (a number of 37 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1212220395 and 1212220404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4810273 + ... + 4810524.

It is an arithmetic number, because the mean of its divisors is an integer number (125070374).

Almost surely, 2^1212220422 is an apocalyptic number.

1212220422 is an abundant number, since it is smaller than the sum of its proper divisors (1789468554).

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

1212220422 is a wasteful number, since it uses less digits than its factorization.

1212220422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9620812 (or 9620809 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1212220422 is about 34816.9559553962. The cubic root of 1212220422 is about 1066.2536529705.

Adding to 1212220422 its reverse (2240222121), we get a palindrome (3452442543).

The spelling of 1212220422 in words is "one billion, two hundred twelve million, two hundred twenty thousand, four hundred twenty-two".