21011002321120 has 96 divisors (see below), whose sum is σ = 57137834073600. Its totient is φ = 7151946471936.

The previous prime is 21011002321009. The next prime is 21011002321121. The reversal of 21011002321120 is 2112320011012.

It is a super-2 number, since 2×21011002321120² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 21011002321094 and 21011002321103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011002321121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67325700 + ... + 67637059.

It is an arithmetic number, because the mean of its divisors is an integer number (595185771600).

Almost surely, 2^{21011002321120} is an apocalyptic number.

21011002321120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011002321120 is an abundant number, since it is smaller than the sum of its proper divisors (36126831752480).

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

21011002321120 is a wasteful number, since it uses less digits than its factorization.

21011002321120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134962920 (or 134962912 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21011002321120 its reverse (2112320011012), we get a palindrome (23123322332132).

The spelling of 21011002321120 in words is "twenty-one trillion, eleven billion, two million, three hundred twenty-one thousand, one hundred twenty".