21021111330122 has 8 divisors (see below), whose sum is σ = 32300732043972. Its totient is φ = 10254200648800.

The previous prime is 21021111330103. The next prime is 21021111330169. The reversal of 21021111330122 is 22103311112012.

It can be written as a sum of positive squares in 2 ways, for example, as 13932519251641 + 7088592078481 = 3732629^2 + 2662441^2 .

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 = 21021111330094 and 21021111330103.

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, 128177508029 + ... + 128177508192.

Almost surely, 2^{21021111330122} is an apocalyptic number.

21021111330122 is a deficient number, since it is larger than the sum of its proper divisors (11279620713850).

21021111330122 is a wasteful number, since it uses less digits than its factorization.

21021111330122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256355016264.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21021111330122 its reverse (22103311112012), we get a palindrome (43124422442134).

The spelling of 21021111330122 in words is "twenty-one trillion, twenty-one billion, one hundred eleven million, three hundred thirty thousand, one hundred twenty-two".