21010022020222 has 4 divisors (see below), whose sum is σ = 31515033030336. Its totient is φ = 10505011010110.

The previous prime is 21010022020219. The next prime is 21010022020241. The reversal of 21010022020222 is 22202022001012.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21010022020196 and 21010022020205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252505505054 + ... + 5252505505057.

It is an arithmetic number, because the mean of its divisors is an integer number (7878758257584).

Almost surely, 2^{21010022020222} is an apocalyptic number.

21010022020222 is a deficient number, since it is larger than the sum of its proper divisors (10505011010114).

21010022020222 is a wasteful number, since it uses less digits than its factorization.

21010022020222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10505011010113.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21010022020222 its reverse (22202022001012), we get a palindrome (43212044021234).

The spelling of 21010022020222 in words is "twenty-one trillion, ten billion, twenty-two million, twenty thousand, two hundred twenty-two".