21020210022020 has 24 divisors (see below), whose sum is σ = 48155390232768. Its totient is φ = 7643712735200.

The previous prime is 21020210022001. The next prime is 21020210022061. The reversal of 21020210022020 is 2022001202012.

It is a junction number, because it is equal to n+sod(n) for n = 21020210021986 and 21020210022004.

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 7 ways as a sum of consecutive naturals, for example, 47773204376 + ... + 47773204815.

It is an arithmetic number, because the mean of its divisors is an integer number (2006474593032).

Almost surely, 2^{21020210022020} is an apocalyptic number.

21020210022020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020210022020 is an abundant number, since it is smaller than the sum of its proper divisors (27135180210748).

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

21020210022020 is a wasteful number, since it uses less digits than its factorization.

21020210022020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95546409211 (or 95546409209 counting only the distinct ones).

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

Adding to 21020210022020 its reverse (2022001202012), we get a palindrome (23042211224032).

The spelling of 21020210022020 in words is "twenty-one trillion, twenty billion, two hundred ten million, twenty-two thousand, twenty".