121212222 has 16 divisors (see below), whose sum is σ = 248976912. Its totient is φ = 39312000.

The previous prime is 121212209. The next prime is 121212253. The reversal of 121212222 is 222212121.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272779 + ... + 273222.

It is an arithmetic number, because the mean of its divisors is an integer number (15561057).

Almost surely, 2^121212222 is an apocalyptic number.

121212222 is an abundant number, since it is smaller than the sum of its proper divisors (127764690).

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

121212222 is a wasteful number, since it uses less digits than its factorization.

121212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546043.

The product of its digits is 64, while the sum is 15.

The square root of 121212222 is about 11009.6422285195. The cubic root of 121212222 is about 494.8977403290.

Adding to 121212222 its reverse (222212121), we get a palindrome (343424343).

The spelling of 121212222 in words is "one hundred twenty-one million, two hundred twelve thousand, two hundred twenty-two".