21112221121022 has 8 divisors (see below), whose sum is σ = 31810342138176. Its totient is φ = 10508773741632.

The previous prime is 21112221120997. The next prime is 21112221121073. The reversal of 21112221121022 is 22012112221112.

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 = 21112221120985 and 21112221121003.

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, 23668408883 + ... + 23668409774.

It is an arithmetic number, because the mean of its divisors is an integer number (3976292767272).

Almost surely, 2^{21112221121022} is an apocalyptic number.

21112221121022 is a deficient number, since it is larger than the sum of its proper divisors (10698121017154).

21112221121022 is a wasteful number, since it uses less digits than its factorization.

21112221121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47336818882.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21112221121022 its reverse (22012112221112), we get a palindrome (43124333342134).

The spelling of 21112221121022 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, twenty-two".