121123212222 has 32 divisors (see below), whose sum is σ = 245421204480. Its totient is φ = 39845725920.

The previous prime is 121123212209. The next prime is 121123212253. The reversal of 121123212222 is 222212321121.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1040128 + ... + 1150700.

It is an arithmetic number, because the mean of its divisors is an integer number (7669412640).

Almost surely, 2^121123212222 is an apocalyptic number.

121123212222 is an abundant number, since it is smaller than the sum of its proper divisors (124297992258).

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

121123212222 is a wasteful number, since it uses less digits than its factorization.

121123212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112968.

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

Adding to 121123212222 its reverse (222212321121), we get a palindrome (343335533343).

The spelling of 121123212222 in words is "one hundred twenty-one billion, one hundred twenty-three million, two hundred twelve thousand, two hundred twenty-two".