10021212010 has 24 divisors (see below), whose sum is σ = 18856558980. Its totient is φ = 3834200832.

The previous prime is 10021211989. The next prime is 10021212011. The reversal of 10021212010 is 1021212001.

It can be written as a sum of positive squares in 2 ways, for example, as 9595573849 + 425638161 = 97957^2 + 20631^2 .

It is a super-3 number, since 3×10021212010³ (a number of 31 digits) contains 333 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (10021212011) 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, 941895 + ... + 952474.

Almost surely, 2^10021212010 is an apocalyptic number.

10021212010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10021212010 is a deficient number, since it is larger than the sum of its proper divisors (8835346970).

10021212010 is a wasteful number, since it uses less digits than its factorization.

10021212010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894422 (or 1894399 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10021212010 its reverse (1021212001), we get a palindrome (11042424011).

Subtracting from 10021212010 its reverse (1021212001), we obtain a palindrome (9000000009).

The spelling of 10021212010 in words is "ten billion, twenty-one million, two hundred twelve thousand, ten".