21100201212020 has 48 divisors (see below), whose sum is σ = 50728248238080. Its totient is φ = 7221816797184.

The previous prime is 21100201212011. The next prime is 21100201212023. The reversal of 21100201212020 is 2021210200112.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 21100201211986 and 21100201212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100201212023) 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, 130522100 + ... + 130683659.

It is an arithmetic number, because the mean of its divisors is an integer number (1056838504960).

Almost surely, 2^{21100201212020} is an apocalyptic number.

21100201212020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21100201212020 is an abundant number, since it is smaller than the sum of its proper divisors (29628047026060).

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

21100201212020 is a wasteful number, since it uses less digits than its factorization.

21100201212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261206352 (or 261206350 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21100201212020 its reverse (2021210200112), we get a palindrome (23121411412132).

The spelling of 21100201212020 in words is "twenty-one trillion, one hundred billion, two hundred one million, two hundred twelve thousand, twenty".