1222321212 has 48 divisors (see below), whose sum is σ = 3621694720. Its totient is φ = 349234416.

The previous prime is 1222321211. The next prime is 1222321213. The reversal of 1222321212 is 2121232221.

It is an interprime number because it is at equal distance from previous prime (1222321211) and next prime (1222321213).

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222321211) 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, 807658 + ... + 809169.

Almost surely, 2^1222321212 is an apocalyptic number.

1222321212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1222321212 is an abundant number, since it is smaller than the sum of its proper divisors (2399373508).

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

1222321212 is a wasteful number, since it uses less digits than its factorization.

1222321212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616847 (or 1616839 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 1222321212 is about 34961.7106560878. The cubic root of 1222321212 is about 1069.2069740476.

Adding to 1222321212 its reverse (2121232221), we get a palindrome (3343553433).

The spelling of 1222321212 in words is "one billion, two hundred twenty-two million, three hundred twenty-one thousand, two hundred twelve".