122220122121 has 6 divisors (see below), whose sum is σ = 176540176410. Its totient is φ = 81480081408.

The previous prime is 122220122117. The next prime is 122220122131. The reversal of 122220122121 is 121221022221.

It is a happy number.

122220122121 is a `hidden beast` number, since 1 + 222 + 201 + 221 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 119256952896 + 2963169225 = 345336^2 + 54435^2 .

It is not a de Polignac number, because 122220122121 - 2² = 122220122117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122220122094 and 122220122103.

It is not an unprimeable number, because it can be changed into a prime (122220122131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6790006776 + ... + 6790006793.

It is an arithmetic number, because the mean of its divisors is an integer number (29423362735).

Almost surely, 2^122220122121 is an apocalyptic number.

It is an amenable number.

122220122121 is a deficient number, since it is larger than the sum of its proper divisors (54320054289).

122220122121 is a wasteful number, since it uses less digits than its factorization.

122220122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13580013575 (or 13580013572 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 122220122121 its reverse (121221022221), we get a palindrome (243441144342).

The spelling of 122220122121 in words is "one hundred twenty-two billion, two hundred twenty million, one hundred twenty-two thousand, one hundred twenty-one".