210001000022020 has 48 divisors (see below), whose sum is σ = 441287359354800. Its totient is φ = 83946068029440.

The previous prime is 210001000021987. The next prime is 210001000022029. The reversal of 210001000022020 is 20220000100012.

It can be written as a sum of positive squares in 8 ways, for example, as 41368128421636 + 168632871600384 = 6431806^2 + 12985872^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 210001000021988 and 210001000022006.

It is not an unprimeable number, because it can be changed into a prime (210001000022029) 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, 1391682736 + ... + 1391833624.

It is an arithmetic number, because the mean of its divisors is an integer number (9193486653225).

Almost surely, 2^{210001000022020} is an apocalyptic number.

210001000022020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210001000022020 is an abundant number, since it is smaller than the sum of its proper divisors (231286359332780).

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

210001000022020 is a wasteful number, since it uses less digits than its factorization.

210001000022020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195448 (or 195446 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 210001000022020 its reverse (20220000100012), we get a palindrome (230221000122032).

The spelling of 210001000022020 in words is "two hundred ten trillion, one billion, twenty-two thousand, twenty".