210021211002020 has 144 divisors (see below), whose sum is σ = 485848869085440. Its totient is φ = 76203741968640.

The previous prime is 210021211002017. The next prime is 210021211002023. The reversal of 210021211002020 is 20200112120012.

It is an interprime number because it is at equal distance from previous prime (210021211002017) and next prime (210021211002023).

It is a junction number, because it is equal to n+sod(n) for n = 210021211001986 and 210021211002004.

It is not an unprimeable number, because it can be changed into a prime (210021211002023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6118234097 + ... + 6118268423.

It is an arithmetic number, because the mean of its divisors is an integer number (3373950479760).

Almost surely, 2^{210021211002020} is an apocalyptic number.

210021211002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210021211002020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242924434542720).

210021211002020 is an abundant number, since it is smaller than the sum of its proper divisors (275827658083420).

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

210021211002020 is a wasteful number, since it uses less digits than its factorization.

210021211002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39834 (or 39821 counting only the distinct ones).

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

Adding to 210021211002020 its reverse (20200112120012), we get a palindrome (230221323122032).

The spelling of 210021211002020 in words is "two hundred ten trillion, twenty-one billion, two hundred eleven million, two thousand, twenty".