21121000021122 has 8 divisors (see below), whose sum is σ = 42242000042256. Its totient is φ = 7040333340372.

The previous prime is 21121000021111. The next prime is 21121000021189. The reversal of 21121000021122 is 22112000012112.

It is a sphenic number, since it is the product of 3 distinct primes.

21121000021122 is an admirable number.

It is a super-2 number, since 2×21121000021122² (a number of 27 digits) contains 22 as substring.

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, 1760083335088 + ... + 1760083335099.

It is an arithmetic number, because the mean of its divisors is an integer number (5280250005282).

Almost surely, 2^{21121000021122} is an apocalyptic number.

21121000021122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21121000021122 is a wasteful number, since it uses less digits than its factorization.

21121000021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520166670192.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21121000021122 its reverse (22112000012112), we get a palindrome (43233000033234).

The spelling of 21121000021122 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-one thousand, one hundred twenty-two".