21121002202 has 8 divisors (see below), whose sum is σ = 31765096800. Its totient is φ = 10532636604.

The previous prime is 21121002187. The next prime is 21121002211. The reversal of 21121002202 is 20220012112.

It is a happy number.

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, 13931302 + ... + 13932817.

It is an arithmetic number, because the mean of its divisors is an integer number (3970637100).

Almost surely, 2^21121002202 is an apocalyptic number.

21121002202 is a deficient number, since it is larger than the sum of its proper divisors (10644094598).

21121002202 is a wasteful number, since it uses less digits than its factorization.

21121002202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27864500.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21121002202 its reverse (20220012112), we get a palindrome (41341014314).

The spelling of 21121002202 in words is "twenty-one billion, one hundred twenty-one million, two thousand, two hundred two".