21021002222122 has 8 divisors (see below), whose sum is σ = 36036003809376. Its totient is φ = 9009000952332.

The previous prime is 21021002222113. The next prime is 21021002222131. The reversal of 21021002222122 is 22122220012012.

It is an interprime number because it is at equal distance from previous prime (21021002222113) and next prime (21021002222131).

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 21021002222122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750750079348 + ... + 750750079375.

It is an arithmetic number, because the mean of its divisors is an integer number (4504500476172).

Almost surely, 2^{21021002222122} is an apocalyptic number.

21021002222122 is a deficient number, since it is larger than the sum of its proper divisors (15015001587254).

21021002222122 is a wasteful number, since it uses less digits than its factorization.

21021002222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501500158732.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21021002222122 its reverse (22122220012012), we get a palindrome (43143222234134).

The spelling of 21021002222122 in words is "twenty-one trillion, twenty-one billion, two million, two hundred twenty-two thousand, one hundred twenty-two".