21121222010120 has 32 divisors (see below), whose sum is σ = 49588956025920. Its totient is φ = 8081163203520.

The previous prime is 21121222010113. The next prime is 21121222010131. The reversal of 21121222010120 is 2101022212112.

It is a super-3 number, since 3×21121222010120³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 7 ways as a sum of consecutive naturals, for example, 11478924086 + ... + 11478925925.

It is an arithmetic number, because the mean of its divisors is an integer number (1549654875810).

Almost surely, 2^{21121222010120} is an apocalyptic number.

21121222010120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21121222010120 is an abundant number, since it is smaller than the sum of its proper divisors (28467734015800).

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

21121222010120 is a wasteful number, since it uses less digits than its factorization.

21121222010120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22957850045 (or 22957850041 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21121222010120 its reverse (2101022212112), we get a palindrome (23222244222232).

The spelling of 21121222010120 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred twenty-two million, ten thousand, one hundred twenty".