21010210323020 has 24 divisors (see below), whose sum is σ = 45197574403968. Its totient is φ = 8199106467200.

The previous prime is 21010210323001. The next prime is 21010210323029. The reversal of 21010210323020 is 2032301201012.

It is a self number, because there is not a number n which added to its sum of digits gives 21010210323020.

It is not an unprimeable number, because it can be changed into a prime (21010210323029) 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, 12811103036 + ... + 12811104675.

It is an arithmetic number, because the mean of its divisors is an integer number (1883232266832).

Almost surely, 2^{21010210323020} is an apocalyptic number.

21010210323020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010210323020 is an abundant number, since it is smaller than the sum of its proper divisors (24187364080948).

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

21010210323020 is a wasteful number, since it uses less digits than its factorization.

21010210323020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25622207761 (or 25622207759 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21010210323020 its reverse (2032301201012), we get a palindrome (23042511524032).

The spelling of 21010210323020 in words is "twenty-one trillion, ten billion, two hundred ten million, three hundred twenty-three thousand, twenty".