21120121202 has 8 divisors (see below), whose sum is σ = 31908097200. Its totient is φ = 10484088804.

The previous prime is 21120121199. The next prime is 21120121229. The reversal of 21120121202 is 20212102112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37985552 + ... + 37986107.

It is an arithmetic number, because the mean of its divisors is an integer number (3988512150).

Almost surely, 2^21120121202 is an apocalyptic number.

21120121202 is a deficient number, since it is larger than the sum of its proper divisors (10787975998).

21120121202 is a wasteful number, since it uses less digits than its factorization.

21120121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75971800.

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

Adding to 21120121202 its reverse (20212102112), we get a palindrome (41332223314).

The spelling of 21120121202 in words is "twenty-one billion, one hundred twenty million, one hundred twenty-one thousand, two hundred two".