21021211021122 has 96 divisors (see below), whose sum is σ = 49136292791040. Its totient is φ = 6456622596480.

The previous prime is 21021211020991. The next prime is 21021211021159. The reversal of 21021211021122 is 22112011212012.

21021211021122 is a `hidden beast` number, since 210 + 212 + 1 + 10 + 211 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21021211021095 and 21021211021104.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1127919588 + ... + 1127938224.

It is an arithmetic number, because the mean of its divisors is an integer number (511836383240).

Almost surely, 2^{21021211021122} is an apocalyptic number.

21021211021122 is an abundant number, since it is smaller than the sum of its proper divisors (28115081769918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21021211021122 is a wasteful number, since it uses less digits than its factorization.

21021211021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26928 (or 26925 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21021211021122 its reverse (22112011212012), we get a palindrome (43133222233134).

The spelling of 21021211021122 in words is "twenty-one trillion, twenty-one billion, two hundred eleven million, twenty-one thousand, one hundred twenty-two".