21220210212122 has 8 divisors (see below), whose sum is σ = 31830496709472. Its totient is φ = 10610044642300.

The previous prime is 21220210212073. The next prime is 21220210212167. The reversal of 21220210212122 is 22121201202212.

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 = 21220210212094 and 21220210212103.

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, 29791904 + ... + 30495867.

It is an arithmetic number, because the mean of its divisors is an integer number (3978812088684).

Almost surely, 2^{21220210212122} is an apocalyptic number.

21220210212122 is a deficient number, since it is larger than the sum of its proper divisors (10610286497350).

21220210212122 is a wasteful number, since it uses less digits than its factorization.

21220210212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60463764.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21220210212122 its reverse (22121201202212), we get a palindrome (43341411414334).

The spelling of 21220210212122 in words is "twenty-one trillion, two hundred twenty billion, two hundred ten million, two hundred twelve thousand, one hundred twenty-two".