21010221120202 has 8 divisors (see below), whose sum is σ = 31536582751296. Its totient is φ = 10498026869772.

The previous prime is 21010221120167. The next prime is 21010221120209. The reversal of 21010221120202 is 20202112201012.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (21010221120209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3541841458 + ... + 3541847389.

It is an arithmetic number, because the mean of its divisors is an integer number (3942072843912).

Almost surely, 2^{21010221120202} is an apocalyptic number.

21010221120202 is a deficient number, since it is larger than the sum of its proper divisors (10526361631094).

21010221120202 is a wasteful number, since it uses less digits than its factorization.

21010221120202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7083690332.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21010221120202 its reverse (20202112201012), we get a palindrome (41212333321214).

The spelling of 21010221120202 in words is "twenty-one trillion, ten billion, two hundred twenty-one million, one hundred twenty thousand, two hundred two".