121220002 has 4 divisors (see below), whose sum is σ = 181830006. Its totient is φ = 60610000.

The previous prime is 121219999. The next prime is 121220017. The reversal of 121220002 is 200022121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200022121 = 13 ⋅15386317.

It can be written as a sum of positive squares in only one way, i.e., 101586241 + 19633761 = 10079^2 + 4431^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30304999 + ... + 30305002.

Almost surely, 2^121220002 is an apocalyptic number.

121220002 is a deficient number, since it is larger than the sum of its proper divisors (60610004).

121220002 is an equidigital number, since it uses as much as digits as its factorization.

121220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60610003.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 121220002 is about 11009.9955494996. The cubic root of 121220002 is about 494.9083284309.

Adding to 121220002 its reverse (200022121), we get a palindrome (321242123).

The spelling of 121220002 in words is "one hundred twenty-one million, two hundred twenty thousand, two".