121200210122 has 4 divisors (see below), whose sum is σ = 181800315186. Its totient is φ = 60600105060.

The previous prime is 121200210071. The next prime is 121200210143. The reversal of 121200210122 is 221012002121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221012002121 = 410587 ⋅538283.

It can be written as a sum of positive squares in only one way, i.e., 120748605121 + 451605001 = 347489^2 + 21251^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121200210097 and 121200210106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30300052529 + ... + 30300052532.

Almost surely, 2^121200210122 is an apocalyptic number.

121200210122 is a deficient number, since it is larger than the sum of its proper divisors (60600105064).

121200210122 is an equidigital number, since it uses as much as digits as its factorization.

121200210122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60600105063.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121200210122 its reverse (221012002121), we get a palindrome (342212212243).

The spelling of 121200210122 in words is "one hundred twenty-one billion, two hundred million, two hundred ten thousand, one hundred twenty-two".