121910002 has 4 divisors (see below), whose sum is σ = 182865006. Its totient is φ = 60955000.

The previous prime is 121909999. The next prime is 121910003. The reversal of 121910002 is 200019121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200019121 = 12157 ⋅16453.

It can be written as a sum of positive squares in only one way, i.e., 121462441 + 447561 = 11021^2 + 669^2 .

It is not an unprimeable number, because it can be changed into a prime (121910003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30477499 + ... + 30477502.

Almost surely, 2^121910002 is an apocalyptic number.

121910002 is a deficient number, since it is larger than the sum of its proper divisors (60955004).

121910002 is an equidigital number, since it uses as much as digits as its factorization.

121910002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60955003.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 121910002 is about 11041.2862475347. The cubic root of 121910002 is about 495.8455798559.

Adding to 121910002 its reverse (200019121), we get a palindrome (321929123).

The spelling of 121910002 in words is "one hundred twenty-one million, nine hundred ten thousand, two".