10020200010021 has 12 divisors (see below), whose sum is σ = 14473727462220. Its totient is φ = 6680084774400.

The previous prime is 10020200009957. The next prime is 10020200010061. The reversal of 10020200010021 is 12001000202001.

It can be written as a sum of positive squares in 2 ways, for example, as 729804569796 + 9290395440225 = 854286^2 + 3048015^2 .

It is not a de Polignac number, because 10020200010021 - 2⁶ = 10020200009957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10020200009985 and 10020200010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10020200010061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2717430 + ... + 5236871.

It is an arithmetic number, because the mean of its divisors is an integer number (1206143955185).

Almost surely, 2^{10020200010021} is an apocalyptic number.

It is an amenable number.

10020200010021 is a deficient number, since it is larger than the sum of its proper divisors (4453527452199).

10020200010021 is a wasteful number, since it uses less digits than its factorization.

10020200010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8094276 (or 8094273 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 10020200010021 its reverse (12001000202001), we get a palindrome (22021200212022).

The spelling of 10020200010021 in words is "ten trillion, twenty billion, two hundred million, ten thousand, twenty-one".