21021100301020 has 96 divisors (see below), whose sum is σ = 44453359742400. Its totient is φ = 8349748445184.

The previous prime is 21021100300943. The next prime is 21021100301023. The reversal of 21021100301020 is 2010300112012.

It is a super-2 number, since 2×21021100301020² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021100301023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8548636551 + ... + 8548639009.

It is an arithmetic number, because the mean of its divisors is an integer number (463055830650).

Almost surely, 2^{21021100301020} is an apocalyptic number.

21021100301020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21021100301020 is an abundant number, since it is smaller than the sum of its proper divisors (23432259441380).

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

21021100301020 is a wasteful number, since it uses less digits than its factorization.

21021100301020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5767 (or 5765 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21021100301020 its reverse (2010300112012), we get a palindrome (23031400413032).

The spelling of 21021100301020 in words is "twenty-one trillion, twenty-one billion, one hundred million, three hundred one thousand, twenty".