21010020001120 has 48 divisors (see below), whose sum is σ = 49649056183440. Its totient is φ = 8401826594304.

The previous prime is 21010020001067. The next prime is 21010020001121. The reversal of 21010020001120 is 2110002001012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 21010020001097 and 21010020001106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010020001121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16423830 + ... + 17656789.

It is an arithmetic number, because the mean of its divisors is an integer number (1034355337155).

Almost surely, 2^{21010020001120} is an apocalyptic number.

21010020001120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010020001120 is an abundant number, since it is smaller than the sum of its proper divisors (28639036182320).

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

21010020001120 is a wasteful number, since it uses less digits than its factorization.

21010020001120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34084487 (or 34084479 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21010020001120 its reverse (2110002001012), we get a palindrome (23120022002132).

The spelling of 21010020001120 in words is "twenty-one trillion, ten billion, twenty million, one thousand, one hundred twenty".