10020021210 has 24 divisors (see below), whose sum is σ = 26052055380. Its totient is φ = 2672005632.

The previous prime is 10020021197. The next prime is 10020021211. The reversal of 10020021210 is 1212002001.

It can be written as a sum of positive squares in 2 ways, for example, as 9741097809 + 278923401 = 98697^2 + 16701^2 .

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 = 10020021192 and 10020021201.

It is not an unprimeable number, because it can be changed into a prime (10020021211) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 55666695 + ... + 55666874.

Almost surely, 2^10020021210 is an apocalyptic number.

10020021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10020021210 is an abundant number, since it is smaller than the sum of its proper divisors (16032034170).

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

10020021210 is a wasteful number, since it uses less digits than its factorization.

10020021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111333582 (or 111333579 counting only the distinct ones).

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

Adding to 10020021210 its reverse (1212002001), we get a palindrome (11232023211).

The spelling of 10020021210 in words is "ten billion, twenty million, twenty-one thousand, two hundred ten".