21210202021010 has 8 divisors (see below), whose sum is σ = 38178363637836. Its totient is φ = 8484080808400.

The previous prime is 21210202021007. The next prime is 21210202021037. The reversal of 21210202021010 is 1012020201212.

It can be written as a sum of positive squares in 2 ways, for example, as 20519060861209 + 691141159801 = 4529797^2 + 831349^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×21210202021010³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060510101041 + ... + 1060510101060.

Almost surely, 2^{21210202021010} is an apocalyptic number.

21210202021010 is a deficient number, since it is larger than the sum of its proper divisors (16968161616826).

21210202021010 is a wasteful number, since it uses less digits than its factorization.

21210202021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121020202108.

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

Adding to 21210202021010 its reverse (1012020201212), we get a palindrome (22222222222222).

The spelling of 21210202021010 in words is "twenty-one trillion, two hundred ten billion, two hundred two million, twenty-one thousand, ten".