121220021222222 has 32 divisors (see below), whose sum is σ = 205144805053440. Its totient is φ = 53301985308000.

The previous prime is 121220021222191. The next prime is 121220021222227. The reversal of 121220021222222 is 222222120022121.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220021222227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 403652822 + ... + 403953017.

It is an arithmetic number, because the mean of its divisors is an integer number (6410775157920).

Almost surely, 2^{121220021222222} is an apocalyptic number.

121220021222222 is a deficient number, since it is larger than the sum of its proper divisors (83924783831218).

121220021222222 is a wasteful number, since it uses less digits than its factorization.

121220021222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807606128.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 121220021222222 its reverse (222222120022121), we get a palindrome (343442141244343).

The spelling of 121220021222222 in words is "one hundred twenty-one trillion, two hundred twenty billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty-two".