122210002121 has 4 divisors (see below), whose sum is σ = 123420002244. Its totient is φ = 121000002000.

The previous prime is 122210002091. The next prime is 122210002129. The reversal of 122210002121 is 121200012221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121200012221 = 101 ⋅1200000121.

It can be written as a sum of positive squares in 2 ways, for example, as 62968876096 + 59241126025 = 250936^2 + 243395^2 .

It is a cyclic number.

It is not a de Polignac number, because 122210002121 - 2¹⁰ = 122210001097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 122210002096 and 122210002105.

It is not an unprimeable number, because it can be changed into a prime (122210002129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 604999910 + ... + 605000111.

It is an arithmetic number, because the mean of its divisors is an integer number (30855000561).

Almost surely, 2^122210002121 is an apocalyptic number.

It is an amenable number.

122210002121 is a deficient number, since it is larger than the sum of its proper divisors (1210000123).

122210002121 is a wasteful number, since it uses less digits than its factorization.

122210002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210000122.

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

Adding to 122210002121 its reverse (121200012221), we get a palindrome (243410014342).

The spelling of 122210002121 in words is "one hundred twenty-two billion, two hundred ten million, two thousand, one hundred twenty-one".