21202021022222 has 8 divisors (see below), whose sum is σ = 31803776445672. Its totient is φ = 10600762207000.

The previous prime is 21202021022219. The next prime is 21202021022251. The reversal of 21202021022222 is 22222012020212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21202021022194 and 21202021022203.

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, 124045304 + ... + 124216107.

It is an arithmetic number, because the mean of its divisors is an integer number (3975472055709).

Almost surely, 2^{21202021022222} is an apocalyptic number.

21202021022222 is a deficient number, since it is larger than the sum of its proper divisors (10601755423450).

21202021022222 is a wasteful number, since it uses less digits than its factorization.

21202021022222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248304114.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21202021022222 its reverse (22222012020212), we get a palindrome (43424033042434).

The spelling of 21202021022222 in words is "twenty-one trillion, two hundred two billion, twenty-one million, twenty-two thousand, two hundred twenty-two".