21000220001010 has 48 divisors (see below), whose sum is σ = 54600949465920. Its totient is φ = 5600019952800.

The previous prime is 21000220000993. The next prime is 21000220001041. The reversal of 21000220001010 is 1010002200012.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21000220000983 and 21000220001001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13732371 + ... + 15184809.

It is an arithmetic number, because the mean of its divisors is an integer number (1137519780540).

Almost surely, 2^{21000220001010} is an apocalyptic number.

21000220001010 is an abundant number, since it is smaller than the sum of its proper divisors (33600729464910).

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

21000220001010 is a wasteful number, since it uses less digits than its factorization.

21000220001010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613103 (or 1613100 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21000220001010 its reverse (1010002200012), we get a palindrome (22010222201022).

The spelling of 21000220001010 in words is "twenty-one trillion, two hundred twenty million, one thousand, ten".