121212221322 has 32 divisors (see below), whose sum is σ = 262945315584. Its totient is φ = 37099865600.

The previous prime is 121212221321. The next prime is 121212221323. The reversal of 121212221322 is 223122212121.

It is an interprime number because it is at equal distance from previous prime (121212221321) and next prime (121212221323).

It is a super-2 number, since 2×121212221322² (a number of 23 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (121212221321) 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, 14487954 + ... + 14496317.

It is an arithmetic number, because the mean of its divisors is an integer number (8217041112).

Almost surely, 2^121212221322 is an apocalyptic number.

121212221322 is an abundant number, since it is smaller than the sum of its proper divisors (141733094262).

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

121212221322 is a wasteful number, since it uses less digits than its factorization.

121212221322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28984334.

The product of its digits is 384, while the sum is 21.

Adding to 121212221322 its reverse (223122212121), we get a palindrome (344334433443).

The spelling of 121212221322 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred twenty-one thousand, three hundred twenty-two".