21121202000120 has 32 divisors (see below), whose sum is σ = 49588909045920. Its totient is φ = 8081155547520.

The previous prime is 21121202000039. The next prime is 21121202000123. The reversal of 21121202000120 is 2100020212112.

It is a super-2 number, since 2×21121202000120² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121202000095 and 21121202000104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121202000123) by changing a digit.

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, 11478913211 + ... + 11478915050.

It is an arithmetic number, because the mean of its divisors is an integer number (1549653407685).

Almost surely, 2^{21121202000120} is an apocalyptic number.

21121202000120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21121202000120 is an abundant number, since it is smaller than the sum of its proper divisors (28467707045800).

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

21121202000120 is a wasteful number, since it uses less digits than its factorization.

21121202000120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22957828295 (or 22957828291 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21121202000120 its reverse (2100020212112), we get a palindrome (23221222212232).

The spelling of 21121202000120 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred two million, one hundred twenty", and thus it is an aban number.