21110020202 has 16 divisors (see below), whose sum is σ = 32442118272. Its totient is φ = 10297416480.

The previous prime is 21110020159. The next prime is 21110020231. The reversal of 21110020202 is 20202001112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329324 + ... + 388167.

It is an arithmetic number, because the mean of its divisors is an integer number (2027632392).

Almost surely, 2^21110020202 is an apocalyptic number.

21110020202 is a deficient number, since it is larger than the sum of its proper divisors (11332098070).

21110020202 is a wasteful number, since it uses less digits than its factorization.

21110020202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717853.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21110020202 its reverse (20202001112), we get a palindrome (41312021314).

The spelling of 21110020202 in words is "twenty-one billion, one hundred ten million, twenty thousand, two hundred two".