21202000122020 has 48 divisors (see below), whose sum is σ = 45094382860800. Its totient is φ = 8372225197440.

The previous prime is 21202000122011. The next prime is 21202000122029. The reversal of 21202000122020 is 2022100020212.

It is an interprime number because it is at equal distance from previous prime (21202000122011) and next prime (21202000122029).

It is a junction number, because it is equal to n+sod(n) for n = 21202000121986 and 21202000122004.

It is not an unprimeable number, because it can be changed into a prime (21202000122029) 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, 9879686 + ... + 11832674.

It is an arithmetic number, because the mean of its divisors is an integer number (939466309600).

Almost surely, 2^{21202000122020} is an apocalyptic number.

21202000122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202000122020 is an abundant number, since it is smaller than the sum of its proper divisors (23892382738780).

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

21202000122020 is a wasteful number, since it uses less digits than its factorization.

21202000122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1959948 (or 1959946 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21202000122020 its reverse (2022100020212), we get a palindrome (23224100142232).

The spelling of 21202000122020 in words is "twenty-one trillion, two hundred two billion, one hundred twenty-two thousand, twenty".