21122222122000 has 80 divisors (see below), whose sum is σ = 51078498516864. Its totient is φ = 8448067440000.

The previous prime is 21122222121977. The next prime is 21122222122013. The reversal of 21122222122000 is 22122222112.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×21122222122000² (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 15 ways as a sum of consecutive naturals, for example, 20273815 + ... + 21290185.

Almost surely, 2^{21122222122000} is an apocalyptic number.

21122222122000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122222122000 is an abundant number, since it is smaller than the sum of its proper divisors (29956276394864).

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

21122222122000 is a wasteful number, since it uses less digits than its factorization.

21122222122000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026785 (or 1026769 counting only the distinct ones).

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

Adding to 21122222122000 its reverse (22122222112), we get a palindrome (21144344344112).

The spelling of 21122222122000 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred twenty-two thousand".