21021011102222 has 8 divisors (see below), whose sum is σ = 31531542738696. Its totient is φ = 10510496855992.

The previous prime is 21021011102213. The next prime is 21021011102243. The reversal of 21021011102222 is 22220111012012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21021011102222.

It is a congruent number.

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, 720368 + ... + 6523875.

It is an arithmetic number, because the mean of its divisors is an integer number (3941442842337).

Almost surely, 2^{21021011102222} is an apocalyptic number.

21021011102222 is a deficient number, since it is larger than the sum of its proper divisors (10510531636474).

21021011102222 is a wasteful number, since it uses less digits than its factorization.

21021011102222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8695122.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21021011102222 its reverse (22220111012012), we get a palindrome (43241122114234).

The spelling of 21021011102222 in words is "twenty-one trillion, twenty-one billion, eleven million, one hundred two thousand, two hundred twenty-two".