210021211022020 has 12 divisors (see below), whose sum is σ = 441044543146284. Its totient is φ = 84008484408800.

The previous prime is 210021211021997. The next prime is 210021211022087. The reversal of 210021211022020 is 20220112120012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 152027716322304 + 57993494699716 = 12329952^2 + 7615346^2 .

It is a junction number, because it is equal to n+sod(n) for n = 210021211021985 and 210021211022003.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5250530275531 + ... + 5250530275570.

It is an arithmetic number, because the mean of its divisors is an integer number (36753711928857).

Almost surely, 2^{210021211022020} is an apocalyptic number.

210021211022020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210021211022020 is an abundant number, since it is smaller than the sum of its proper divisors (231023332124264).

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

210021211022020 is a wasteful number, since it uses less digits than its factorization.

210021211022020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10501060551110 (or 10501060551108 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210021211022020 its reverse (20220112120012), we get a palindrome (230241323142032).

The spelling of 210021211022020 in words is "two hundred ten trillion, twenty-one billion, two hundred eleven million, twenty-two thousand, twenty".