21022012101020 has 48 divisors (see below), whose sum is σ = 50453625008640. Its totient is φ = 7207433296704.

The previous prime is 21022012101019. The next prime is 21022012101037. The reversal of 21022012101020 is 2010121022012.

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 = 21022012100986 and 21022012101004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7973177 + ... + 10276943.

It is an arithmetic number, because the mean of its divisors is an integer number (1051117187680).

Almost surely, 2^{21022012101020} is an apocalyptic number.

21022012101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022012101020 is an abundant number, since it is smaller than the sum of its proper divisors (29431612907620).

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

21022012101020 is a wasteful number, since it uses less digits than its factorization.

21022012101020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368962 (or 2368960 counting only the distinct ones).

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

Adding to 21022012101020 its reverse (2010121022012), we get a palindrome (23032133123032).

The spelling of 21022012101020 in words is "twenty-one trillion, twenty-two billion, twelve million, one hundred one thousand, twenty".